Perhaps we're reaching the upper limits of Moores law.
Intel did confirm only last year that the rate of progress has slowed slightly, although sales decline due to the economic crunch making people a bit more frugal with their money probably hasn't helped their fortunes much either.
They've still got a sizable portion of the market though, I mean it's between them and AMD really, VIA gets a bit of the market, but Intel and AMD are the heavyweights, and if VR manages to get off the starting blocks properly then there could be a small renaissance for the PC as people seek to build the ultimate VR rig that has the peripherals to put you there. That being said, VR needs to come down to a more accessible price before that happens, so if there is going to be a surge then it's probably not for at least another five to six years.
Certainly though the actual physical Personal Computer is going to be evolving further in the near future, in both technical and non-technical manners, I predict a move into bio-tech for data transmission in the not-to-distant future, and a continuation of the transition of data from the physical hard-drive to the virtual 'cloud', of course that depends a lot on internet connection speed, but there may come a time when you don't even need a physical computer as such as the connection allows you to interact with a powerful gaming computer elsewhere in the world which streams the gaming experience to you based upon your inputs. That could work quite well with VR and take a big load off the public base needing beefy rigs in order to get a good experience.
It requires a lot of infrastructure upgrades though, and is probably going to be something for the next generation, most likely not in our lifetimes...well, maybe at the tail-end of mine.