This is where the ‘point of dimminishing return’ arguement is going to come in.
Consider, a ‘bright screen’ typicall means it’s very reflective, this gives bright contrast and great color saturation, but the down-side is that the viewing angles taper off greatly from views off axis.
The more wide-angle dispersion screens provide a more uniform view, such that the audience gets good color saturation from seats that are located to the extreme right or left of axis; however you lose the sharp color saturation and picture quality suffers. To compensate, you need a brighter bulb.
Now, for a bar or nightclub; I’m sure your Spandex solution works very well. It’s not a movie theater; there is substancial ambient light, smoke and background noise. It’s not a theater - people typically have their mind on other things.
But, for a dedicated home theater; a person is going to seriously stare at the screen, and any defects, any variation in reflective qualities, any splotches or distortions will detract from the movie. This is the differences we are talking about.
My screen would be a disaster in your application. It would be destroyed in the first couple of hours of use. Once destroyed, you cannot take windex and a rag and wipe it off - it’s trash.
However, the Spandex screen is the wrong solution for a serious home theater application as well. It’s simply the issue of using the right tool, for the right job.
Plus, you can wash them quickly to get the beer and smoke out of them.
Now, barring setting aside a huge chunk of your average 1800 sq ft tract home for use as a formal theatre room, let's say you've got young chillun and they need game screens ~ these deals are fantastic with kids. You can put them anywhere, take them down at will, set up more than one, project either side ~ and if they get cr*p imbedded in the screen, you can wash it.
Depends on what you need and what you can get for under $100.00