it's out already. the cost is about $8k atm. i don't think it will take that long time for it to get below $2k(mounts not years). for movies a better format than bluray is required to get good use of it, about 1TB maby, the challenge will be to get it out to the market. the price then need to be somehow affordable. 2160p has the benefit of perfekt scaling. it is 2x*2x of 1080p and 3x*3x of 720p.

http://vr-zone.com/articles/sharp-is-ready-for-intel-s-3840x2160-displays/15560.html#