It would help if we had a better idea about the orientation of the rooms -- the space you have available. I agree with those who suggested you consider swapping the functions of the rooms -- make the existing dining room the TV viewing room and move the DR table to another room (LR or FR). Failing that, is it possible to extend the feed from the security cameras to a location where you would actually want to sit and watch TV? Failing that, could you purchase a nice tablet for hubby that he can have with him anywhere in the house, so he would have ready access to view the security feeds? After all, I would think the need to view those feeds is momentary at best -- watch a movie, pause the movie to check cameras for a second, return to movie -- right? He's not going to actually sit there and watch the feeds for any appreciable period of time, I would think (although my father can sit for appreciable periods of time watching the Weather Channel, so what do I know?).

I suggest grouping whatever living room furniture you buy around the fireplace. It is what I did in my long living room (mine is wider than yours). Here are some layout suggestions: Before you buy any furniture, make sure you have the room to lay it out something similar to the above suggestions. Put tape on the floor, if you have to and make sure you have enough room to walk around the furniture. You can also try Basset Furniture and/or La-Z-Boy showrooms. They can help you with furniture arrangement and they do not charge you, like a designer does. For the TV, you could either get an entertainment center that will fit right or left of the fireplace or your could even mount your TV on the wall (I have 2 TV's that are wall mounted and I love it). When I was getting ready to move into my house 3 years ago, I needed brand new living room, dining room, and family room furniture. I shopped sales and I found my 2 sofas that are in my living room first at a furniture store selling La-Z-Boy furniture. I got lucky! The sofas were on sale for over 60% off and after choosing them, everything else fell into place. For the family room, I went to a La-Z-Boy showroom, found a reclining sofa I loved, and it was also on sale. I choose soft, neutral colors for it and two rocking recliners. We use this room to relax and watch movies on our big TV in the family room. I also suggest looking at rooms on Houzz and see what appeals to you, in style and color.

i would not place over the fireplace, that is too high. you can put on an arm on the left side of the book case where the slot is for a smaller one or leave on the wall it is on, then i would give it a larger console. i think i would continue to have the sofa face the fireplace then have two swivels on the right side of the couch so they can turn to the fireplace, the tv, or the couch. i would not even ask about shelves i would quickly have them filled. if that step down gives a problem i think the least expensive solution is a slanted piece of wood shoved against it. well and glued down. if you ever want a little more color or zip, let me know can give you at the least some cool pillowsl. let me know.

I would prefer to see actual pics of the space , a table and chairs there really make no sense at all why not a nice console table with a couple of stoold below it for seating when removing or putting on shoes or boots a piece of art on the wall to the left of the closet and a nice rug.