I know this isn't really the forum i frequent, but i've been down in vegas at NAB all week. JVC was demoing a stacked 4k projector setup, claiming 8k resolution. Absolutely stunning picture. If you relaxed your eyes enough, it almost looked 3D without glasses!
I'm sure it's cheap too... They were saying it needs about 90Mbps worth of data fed to the 2 projectors to produce the 8k image. I wish they would've let me take a picture of it.