Everything you say here is wrong and a total misrepresentation of what I am saying. Try and follow the discussion.I guess PC elitists want to stick with their 2GB cards.
Its not like we need different textures for different objects. Concrete looks almost the same as steel when in motion, so that shaves off a few hundred MB. Lets put ground texture on character clothes and call it a camo - more vram savings!
Middle Earth game uses 3GB of vram maxed. Ultra textures add another 3GB to that. That is 3GB of textures that go into vram. Wanna stream textures from system ram? Why bothering with dGPU? Get Kaveri IGP, since its already overpowering 2400MHz system memory DDR3 anyway.
You cant simply transfer huma memory management in a game straight into PC without any changes, since PC (most) do not support such thing.
Shadow of Mordor does NOT require 6GB of VRAM for ultra textures. There are plenty of people playing the game right now on 2GB, 3GB and 4GB cards using ultra textures.
One example. He's using a GTX 970 and playing at 1440p with ultra textures..