No, it's not growing because of the consoles age. The console caters to a completely different type of gamer. The type of gamer that doesn't know much and needs everything done for them.
I'd say on the whole PC gamers on average would have more knowledge about the systems they use, it doesn't mean it'll be the only successful platform in the future like Cal suggested.
On the note that console gamers suck at games because they're not 'knowledgeable', knowledge =/= intelligence. I play TF2 and CSS all of the time on PC and a lot of people are strawberry floating idiots on those games. Back in the day on another forum I use, I played the PC only gamers on a random game night and I absolutely trashed them at CSS, why? Because as a Halo player I know more than anyone that intelligent play, teamwork and good map manoeuvring are way more important than simply having a keyboard and mouse. High level teamwork is not exclusive to any game, you're always going to come up against people who are skilled at a game and you're always going to have to adapt to beat them. Whether COD or Battlefield or Yoshi's Cookie, it never changes.
I mean, look at the fighting scene. One of the most sophisticated competitive scenes in the industry, it's strawberry floating dead on the PC. Does that mean PC gamers are inept at fighting games? No.
Most of us play the good exclusives on consoles, most of us are just fans of good games and want a quality game experience. People who buy a PC are clearly a different breed of gamer.
I have a mid range PC, I can play the few decent PC exclusives out there whilst being able to chill on xbl with my friends. I don't need to switch to PC gaming because it's finally getting the first sign of prioritised support for the first time in years. If that continues when the new consoles come out then fair enough, I'll wait and see.
Gaming on the PC is again more accessible than ever.
Which is a far cry from how accessible console gaming is.
Kids are growing up with free to play games, TF2 has just indoctrinated a whole new generation of kids in high school who can play TF on low on their school computers.
Oh really, you have evidence that in the last new months 'a whole new generation' of kids decided to ignore their older brothers and opted for TF2 instead of COD?