If it's high end you are aiming for... You get the projector heat
load out of the room and can maintain a low noise floor, to preserve dynamic range.
I'd also consider doing the room in dark, light absorbing finishes. A woven AT screen scatters
light coming off the screen, and you want to capture this light so it doesn't harm the contrast ratio.
You also might want to consider a lighting controller and multiple light sources in different zones.
Lighting is a great way to bring in some WOW factor in a smaller room. You'll also need more lighting
then you'd expect, in a darker room.
And consider a masking solution of some sort.