+1 for projectors.

Some will laugh at getting 4K resolution and then projecting it on a regular white wall, but honestly, you'll get used to it as you project a much larger image than you'd otherwise get with an lcd. Also, there are special paints you can get - or a retractable screen if you feel the need after testing out the projector.

Note: if it is a room with windows make sure to have decent curtains. It's not as FC v bright as a LCD screen.

The best part is that since they're expensive, niche, and bought mostly by businesses, they will never reach consumer market adoption to the level where adding telemetry and ads makes financial sense.