That’s what the PlayStation3 is for.
Or, rather, since there are no video cards that *really* support dX10 just yet, you might find that difficult to do...
1. PS3 and PC gaming are not comparable. Yes many game titles do cross publish, but there are many differences. This is especially true in MMORPG’s
2. PS3 does not use DX10
3. If my 8800GTX is not *relay* running DX10 while I'm playing Crysis, then I'm impressed buy it's imitation.
When it comes down to it different OS's and different hardware configurations are suited to different needs.