Been reading some more wiki's I see.
DX11 is a great incremental improvement in many different areas, especially visual quality and efficiency of certain effects (among other stuff) but much like DX10 it's hardly the panacea you always make it out to be.
Good topic though, and I'd love to see some developer input although I'm also just as sure you'd be telling Ilya what he really should be doing with DX11, or assume he's just lying.
If we're not seeing a lot of implementation of cloud systems like that first video by now after 4 years it's a pretty good indication it's not all it's cracked up to be.
Other systems like SpeedTree have caught on and are being used in CoD (I'm pretty sure) and many other games.