A patterned area rug to tie the seating area together, either large artwork or large grouping of artwork on the walls, and some floor plants to bring the outdoors in.

First -- think of casegoods (or hard furnishings) that will go along with your new fireplace -- perhaps built-in bookcases -- maybe with shelves in the upper sections and closed cupboards below?

And then -- perhaps a large china cabinet on the wall by the eating area? Check your local sales on Craigs List -- it is AMAZING how many folks are selling large buffets (and everything else -- of course!)

As for texture -- look at a large sisal rug for both the eating area and the seating area. You could even add a patterned area rug over the larger sisal underneath!

Look at the website "smith and noble" for curtain ideas ....

Artworks can always provide color and texture too! Check out "art.com" -- and browse through their categories to see if something might interest you ....

Adding tables and lamps can work too -- again -- check your local Craigs List -- for ideas! Or check the Pottery Barn website -- again -- just for ideas, measurements etc.

I added a link to the page of Pottery Barn's Family Room collections -- there may be some inspiration photos that would help you ....

Jan at Rosemary Cottage

Here is a link that might be useful: Pottery Barn Collections -- Family rooms

And here's a link to the Pottery Barn Family Room Idea -- or their inspiration photos ...

Jan

Here is a link that might be useful: Pottery Barn -- family room ideas or photos

Link to Smith and Noble vertical window treatment ideas ....

Jan

Here is a link that might be useful: Smith and Noble window treatments

That is a lovely space and a lovely view.

A stone fireplace in Florida? Kind of unusual, isn't it? Which are you more likely to be doing more of in the living area, sitting around the fireplace or watching TV? Whichever it is, that's what I would design the big wall around.

If you downsize the TV too much, you will have to group the furniture close to it for good viewing.

I had same thought as graywings: fireplace seems unusual, and garden is beautiful. It looks like you have some cobalt blue planters - one thought would be to use some of that blue inside. Maybe some blue and white pottery, or blue and white ikat drapery. Or lacquer the dining table in that beautiful cobalt. Make the TV stand or armoire an attractive piece of furniture, and hang a couple large paintings. You want to leave the tile bare, correct?

I would put floor to ceiling drapes hung on a cable system the length of the wall. Then I would put a distressed red painted sofa table behind the long couch. Then on the fourth picture down I would put a gallery of family portraits on the wall space to the right. I would change out the side table lamp because I think it is too big and it just blends in with the wall. I would go for smaller, wider, and more colorful. Then I would put a large patterned rug, in which you can pull other colors out of, on the floor and put a chunky coffee table on top. Your room is large and it can hold large chunky furniture. I don't really understand what you are wanting to do on the TV/fireplace wall so I can't help you with that. I don't think your room needs a fireplace but if you want one then go for it.

Here is a link that might be useful: Rug Possiblity

your room is plenty big enough to have several 'areas'. i'd certainly have a couple of chairs (not leather and in a brighter color) and a table back by the doors facing outward for just sitting there and enjoying the view.

a lot depends on what you do about a fireplace (i totally understand one in FL - just like one here in AZ!). I'd somehow put the fireplace in with bookcases (with and without doors and some glass doors) along that wall plus the tv. I do think a big tv is called for with that huge wall tho. I'd have it done so that the tv looks built in. I think I might want to leave some wall space open on either end and over the fireplace for artwork (well, I do have a lot of it). Artwork can bring in a lot of color.

I think I'd start with an area rug tho (it'd be oriental type for me). then I'd work with colors in it for colors in artwork to be found, pillows, vases, the 'view' chairs, etc. I'd also put an area rug under the table and chairs - not matching but co-ordinating.

and plants, green and some flowering to add color.

i'd look thru magazines, online and in stores at their wall bookcases/ shelves etc. (take measurements of that wall when looking).

once you get some color in by way of chairs, rugs, artwork etc, then i'd decide if I wanted to keep those walls beigey. once one wall is covered mostly w/fireplace (how about an electric one? off / on with the flip of a switch - and can add some heat on a cool night. or not) and bookshelves, 'built in' TV you'll see if the walls need more color or not.

Spend the time (don't hurry) looking and picking out IDEAS that you both like before making any final decisions.

on the windows - I'd ask around at decorator stores and online about sunblocking panels. I wouldn't really want something with a heavy feel to it tho.

and as with those redoing kitchens and cabinets, check some local woodworkers for the wall cabinetry around your to be fireplace and the TV. medium to dark wood, not light and not painted. going really dark would depend on the dust level there and how much you like to dust. i'd want a lot of glass doors to keep the dust down.

somewhere in there i'd want a tall, thin light of some kind (not a normal lamp) - more of an art piece in a color - turquoise i think i'd want. or purples. doesn't have to be solid - more like multi, maybe some swirls ? with a flowing motion/look to it.