<When Skyrim consumes it's 4GB of VRAM it will continue to expand into "fake" VRAM - as in RAM that ENB provides under the disguise of VRAM. But as the RAM is not fast enough graphic problems start to appear in the game. It will not crash, but there would be problems.> Sounds logical.
<Quote Boris = Problem actually consist from two parts, first is limitation of real VRAM and second is available fake VRAM, which is summ of physical VRAM and some amount of RAM which driver can allocate and use (in old terms these are local and non-local VRAMs). Fix of the problem is very simple and do not require much effort from driver developers.>
I doubt something would be doable for the OS concerning the 4 GB VRAM limitation, but this been said if Boris asked for drivers modifications it's perhaps because there is another problem, relative to drivers / RAM allocation or something.
Here is further explanations on the Nexus wiki, concerning the RAM limitation, OS, hardware, etc...