I've always read/heard that accent walls (whether painted or papered) should end on the inside corners. I'm not sure this wall is a good wall as an accent. :-( Hopefully others will chime in soon. <3 (I partly wanted to post to bump up your thread, and also because I'm curious on the accuracy of the design information I have, lol.)

My first thought when I saw the photo was wondering how accurate the ceiling color is, based on the nearby window -- we don't know if it's north-facing, what time of day the photo was taken etc. And it's a high gloss finish. According to the ID, https://www.instagram.com/p/CFfJZ6eJqza/ the paint color is BM Buckland Blue, which is much more similar to the lamp color than the way the paint color appears in the photo, at least on my screen, Buckland Blue is also warmer in real life than the way the color looks on the ceiling, as a cooler grey tone. It's interesting that this is area isn't an actual room, but the back staircase. I *love* the wallpaper in the Writer's Lair room, and the Mark Sikes living room (though I don't like the baby blue upholstered furniture, rug, and curtains Sikes chose). carol, from the pre-reno photos, it looks like everything except for the panelled library had already been painted, https://www.kipsbaydecoratorshowhouse.org/dallasgallery It's a remarkable effort during a pandemic, and for the very first Kips Bay show house in Dallas. I do think there may have been the idea of going over the top with the rooms to help draw attention to the inaugural Dallas effort, and perhaps with the pandemic, the idea of providing an extra sensory treat for viewers. It's terrific that they're selling virtual tours ($20 each) as well because of the pandemic, to offset the smaller number able or willing to tour in person.

No wallpaper on the TV wall, it's too distracting. I would wait to decide on whether or not to change the paint color on the TV wall until you finish decorating that room. For example, the area rug in there seems boring to me. That room would be so improved with a lively rug such as a hand woven tribal. Or if you like a more traditional rug, a hand-knotted Persian is always perfect. The paint colors and the wainscoting are fine, and you can continue the waiscoting in the hallway if you want. I would not paint the stairway a different color. You don't want the house to give a choppy feeling, especially with the open plans they have nowadays. If you are in love with a particular wallpaer, you can cut a few rectangular pieces and put them up spaced, and frame them with pieces of molding and they look as though they are works of art. This looks very nice in a dining room. I don't particularly care for the wallpaper you chose. It is very dense and a bit odd. I would find not restful or happy or inspiring. If you are bound and determined to have it somewhere, maybe have it as an accent wall behind your headboard in the master bedroom. Often people go bold with the wallpaper in the first floor powder room, but I would find it too disturbing for even there. I can't see the alligator piece very well, but I am wondering if it doesn't belong in a children's room? I don't understand what you are asking about the bathroom.

I would focus on 3 colors predominantly- black for furniture and curtains (existing unless you’re looking to change window treatments too), warm gray for carpet, paint and background colors and gold for accents. I would pull the carpet color from the color of the leaves on the wall paper to tie it together. Same for paint. I’d take one of the colors you like from the paper and match it to paint. I would recommend pottery barn furniture in black - it will look much better than the mid tone gold wood pieces the previous owner had.