I love everything about this pic. Moulding-framed wallpaper from Apartment Therapy via Cole & Son Wallpapers. Clean, tailored couch. Simple modern table. And the color scheme. Awesome from top to bottom.
Summer and Josh's Pumped Up Traditional may have started this trend several years ago. And we've looked at framing wallpaper as artwork, but for big impact like Summer and Josh's, cover a large area of a wall and frame it with trim moulding. Here are some examples:
Also on these boards
Several framed pieces of wallpaper in geometric pattern on wall
I love this birch tree wall paper.