PC, in every aspect.
I don't think that PCs susceptible to worms, trojans, and whatnot are valid points since the topic asks as to what is the better gadget to play games, not as to what's the more secure gadget.
Even consoles suffer from lag. And besides, it concerns the internet connection, albeit a slow pc is to be blamed, as well. One thing that kills the PC is the heavy requirements of some games. Other than that, hands down, the PC will always be superior than the consoles.