What a wonderful room! So well thought-out and well-edited. I agree the blinds don't add anything to your lovely room, and I thought I had a suggestion until I noticed your comment about the fireplace. I am, therefore, flummoxed. Looking forward to others' suggestions.

How many windows are behind the blinds?

Do you like solar shades? They are clean and modern. Wouldn't be an issue with your fireplace.

There are many sources, but here's one from a reliable online source, Country Curtains (yes, I know they don't sound modern, but just look). :-)

https://www.countrycurtains.com/product/040147550+sunscreen+roller+shade.do?sortby=ourPicks&refType=&from=fn&ecList=7&ecCategory=55

Great feedback so far! This is the best I can do from the outside. This window faces north and my LR is pretty dark. This is FL though so blazing isn't welcome either.

I normally prefer fabric window treatments, but in your case I would go with either white wood blinds or white plantation shutters.

I think I'd add a cornice in a fabric that works with the rest of your room. Which I love by the way. I'm a big MCM fan too. It would be nice if you could purchase new blinds in fabric that is close, a tad lighter, than the wall color.

Blinds tinted.

The cornice is a good idea but where would I order something like that? I do love the verticals for their functionality, especially with a nosey big dog who looks out the window. Maybe I can source better looking slats too. I hate to have to go off my wall color though. Whole other can of worms as I find the revere pewter to peachy during daytime.

You might consider getting venetian blinds in a color with contrasting tape.

I like Tibbrix's suggestion. Clean lines and sophisticated.

I like the valence idea the best.

Odd man out here. I like what you have. They fit the room.

You could do a honeycomb/silhouette-type blind. It would keep the clean look you get with the verticals, but update it a bit. Our house has some of the high, narrow windows that come with ca. 1960 construction, and the silhouette blinds work great. I would get them in a shade similar to the wall color.

JungleGal, you can find kits for making your own cornice, Google DIY cornice kits, or have it done by a local craftsperson. Here's one I made for a client a few years ago. It was a lot larger than what you'd need. My client wanted the beading and scallop added like one she had in a previous home.

Big nosey dog?.....no venetians, no silhouettes, unless you feel like spending big money and throwing it out quickly. I'm with FinallyHome, I like what you have. Valence might be a nice touch to add another color note to the room without adding delicate-for-dog window treatments (read thread on cats and why we can't have nice things...applies to those with dogs too!)

P.S. the verticals don't look any cheaper than any other window treatment.

We love our 2 inch horizontal blinds at our house. They allow for privacy and light control. Love the cove ceilings at your house. Those are not modern at all, an example of the character that your home has. Show those things off. They're very sought after. You're lucky to have them. Lowe's has Levelor Dover 1 1/2 - 2 inch wide slat blinds on line (not in their stores). I have used them all over my house. They are an off white that will blend in very well with your decor, and they are very popular now. Perfect for your room and not expensive.

A lot of suggestions! I thank you all. I will ponder all of them & report back. I think I may have to go with function over aesthetic though because of my 3 dogs (1 big, 2 little) & not wanting to be on display during daytime.

JungleGal, you can make cornice boards yourself. It's not hard at all. It involves wrapping the board with batting and then putting the fabric over the batting, then staple. Don't use a manual staple gun (I have tennis elbow as a result). There are probably many videos on you tube, but you probably don't need them, Good Luck!

two ideas come to mind. One is several panels of white or off white sheers that are slightly opaque. I did this once with the same kind of blinds you have and they really hid them and looked nice.

Also you can find some interesting stiff panels at IKEA