Good post/article here on the esram. I'm not copying the whole article, just the important points....vids/pics/full article at the link:
http://www.giantbomb.com/forums/xbo...-32mb-to-6gb-worth-of-texture-1448545/?page=1
X1 eSRAM + DX 11.2. From 32Mb to 6GB worth of textures.
So basically if devs use this feature on MMO/Massive open world games, they could potentially look better on X1 then PS4?