I know that due to DCI standards/limitations a single projector "can" only play movies in 2K3D (500 mbit/s cap) - even if it's (theoretically) capable of 4k3D. But what about dual projections? A cinema is promoting that they'll show Star Wars in 3D with two Sony 4K projectiors and brand their advertisments for the movie with the "Sony Digital Cinema 4k" logo.