What is the actual percentage of people exclusively listening to vinyl vs digital?

Extremely maximalistic approach. All depends on effect you want to reach. Mirrors could be very helpful at some situations.

@surfmuz

Watch this if you want to know how it works. Even bare wall is bad for the sound. I use acoustic panels on my ceiling and on my walls.

TV screens, pictures in the frames with glass surface - this is all must be removed from the walls in the listening room.

Before people start talking about sonic difference between different media format they must prepare their room, it much more important for the sound.

chakster, you are in a good company.
(I do not have a TV. One of the reasons is......black TV screen is so ugly in any interior.)

@glupson I’d like to recommend Samsung The Serif to my mom, she’s watching TV (I don’t watch TV at all, but this is the only one affordable tv design I like).

chakster,

That The Serif to me looks just like Frame (both Samsung) to me. Maybe it is the same with different name for different market. It is as good as it gets for a TV. Otherwise, probably the best solution is ultra-short-throw projector. No screen whatsoever, as long as you have a decent wall. Unfortunately, those good ones are still a bit expensive for an average buyer.

Just one example...

4K SXRD™ Home Theater Projector | VPL-VZ1000ES | Sony US

I would trip the stand and break it in the first few weeks. Putting 55" of glass on an easy to trip over stand does not make me say "I gotta have it" :-).  Is the screen white when it is off or do I now have Wall color, white, black instead of wall color, black?

@chakster 

(glass) is pure evil for room acoustic and must be covered if possible by absorbers or diffusers.

You missing the whole point. Acoustic reflection process is pure physics and implementation of it into the listening room setup, where the goal is full Spectrum music SQ (some time customised depends on genre or personal preference), is balanced process and not always dogmatic but compromised. Some flows of sound Spectrum you want to be reflected other not, that why all those room acoustic analysis services are silly. If you just try to break your sound flow with  diffusers and rugged walls to as smallest particles you can, you wrong cause you will get nothing but dull woolly sound. Check it out how glass or sleek surface could be implemented-
https://youtube.com/watch?v=f5tS2ikuuro&feature=share

It is impossible to control  the timing of sound wavefronts without using ALSO  positively reflective surface or introducing new reflective surface  if needed in a room...

 All acoustic  is about  balance control....