It effects everyone who is rational.

I'm only running a GTX285 at the moment. But when I upgrade it would be handy to keep the 285 as a physx card. But because of Nvidia's actions (pertaining to the thread OP, is that reversed now?) I would only be able to do that if I decided to upgrade to another Nvidia card even if an ATI card is the better choice at the time.

The only people this doesn't affect are those who don't own an Nvidia card and never will, and those that own an Nvidia card and will never own something from another brand. I'm sure there is a name for those kind of people...