IMO, physics cards are dead (or going to die). CPUs and GPUs are now powerful enough to handle physics, and 99% of people don't want to dish out extra money for a dedicated physics card.
Hmm...I guess that would divide the CPU market though. I mean regular users wouldn't want to pay extra for a CPU that's extra efficient for gaming, when all they're doing is word processing. So they'd have to sell different CPUs for those types of users, correct?