I have tested the 4K screen material and it is actually excellent and transparent for video. Where I find an issue with it actually was audio. Its tight weave causes the high frequencies to get muffled if it is too close to the speaker. If you put 2-3 inches of gap then the compromise becomes much smaller. That said, your Datasat probably compensated for this some.Amir
Thanks for the feedback and thanks for your latest CES report....I enjoyed it. You are right about the screen width. I chose to stick with 16:9(1.78) ratio rather than 2.37 as my kids still watch a lot of sports and TV programs on the projector. With an 8 foot ceiling and the need to have the bottom of the screen up high enough to work with two rows of seating....I was maxed out with the 110" wide screen or 126" diagonal. Its a Seymour Reference screen using the woven Enlightor 4K fabric. I realized as I set this up that putting the center channel behind the screen would be a compromise (but I really wanted the Mezzo and it was too large to put in the middle of the room with Kids/friends)....I had some experience with perforated vinyl and was not ok with those results. This screen provided the ability to place the speaker behind it with minimal impact on sound or the picture quality. i would imagine some hard core videophiles would disagree. On the lighting, I can't believe how easy it is to customize.....we put the cans, sconces and riser lights on separate Lutron Ri switches and the Savant software allows all kinds of flexibility. When I press play all lights go dark....press pause and the riser LEDs come on and the sconces go to dim.....press stop and the lighting slowly comes back to full on. While the Savant may not be a Creston system....its a long way from me self programming my Philips Pronto
Here are a set of measurements I made on my Revel speakers with its grill, the 2K and 4K screens:

In my case the screen was going to cover all of my speakers so I opted to not do that. In your case, it is just the center channel and given the compensation above, I think it is a non-issue.
Again, a great room and thanks for the kind words regarding my CES thread