Like many here, I have already invested far too much of my limited income in 3.5 to throw it all out the window and jump into the new edition.
I plan to stick with 3.5 until it is truly no longer a viable option to do so (which is likely to be a long time off), and then look very seriously at what other systems are available for a more reasonable cost. I'm sure that eventually I'll upgrade to D&D 4.x, but probably not for years, and maybe not until 5.x comes along.
So, while Paizo is certainly going to have to go to version 4 at some point, the longer they put that off and continue to support those of us who actually have to budget our entertainment dollars, the happier I'll be.