from dalite's material selection guide:
3d virtual grey
viewing 1/2 angle: 11 degrees
I seriously hope that is a misprint, but given it retains 99% of polarization, I'm guessing it is indeed 11 degrees. ouch. I would NEVER consider a screen with 11 degree half angle... that means that sitting in the prime seating position with a 36 degree viewing angle (THX recommended for 16:9), the edges of the screen would be significantly less than half as bright as the center. I , for one, do not want to feel like I'm watching a movie in a tunnel. Two screens is far and away still best option, IMHO.
"A wide screen just makes a bad film twice as bad. "
I wonder what he'd think about 3D IMAX?