I'd love to see a game thats a proper poster child for DX11 but as far as I'm concerned such a game has yet to surface. I'm mostly worried about performance in titles today personally. Sure it will be nice when more DX11 content makes its way to the market (summer next year perhaps... ) to have solid hardware available but I remember with both my 8800GTX and later on 8800GTS 512s that I never felt there was a DX10 title worth its salt in those cards lifetime ( ie one that didnt incure a large performance penalty or being worth the hit visually ) It wasn't until I had my 4870x2 that felt running most DX10 games were playable.

I'd love to see this 3 - 4 times increase but odds are this is best case market speak. Even 2x would make it competitive so anything beyond that is just gravy.