I'm most certainly getting a Playstation 4. Not at launch, sure, but a year or two from now, definitely.
Hopefully with the architecture of the next-gen consoles we'll start to see more PC ports, but there are bound to be some games that don't make the transition. Also about the exclusives to each company, Sony has like 15 first party studios, MS just can't compete with that. Sure they'll throw their money at companies for exclusives, like they did this gen, but if they follow the same trend they'll probably just be timed exclusives and they stop once they have a decent enough install base again. Plus, Sony makes some more experimental games, like Journey or Beyond: Two Souls, the MS exclusives I know, disregarding kinect, are mostly action games.