I still haven't got DKS but I was already quite pleased with ED on the Xbox as it was, so I'm curious about the improvements. In this video, the graphics do already look quite a bit better, much more vibrant. Good job Larian!
But I think it really only covers the first part of the game, before unlocking the tower, since he doesn't even mention enchanting, alchemy, or even dragon gameplay. He only shows the small part of dragon form from when talana converts you