Of course this is a difficult question without knowing anything about the three upcoming consoles (with the exception of the Wii U), but we're wondering how gamers view their hobby these days.
Personally, I've always had one rule- I just want to play the best games available. And as it has turned out, that means I really haven't been able to own only one console in any generation, dating back to the SNES/Genesis days. The only possible exception might be the original PlayStation generation when I was a strict RPG player and there wasn't anything on the N64 that interested me. However, even then, I could list the PC as another platform I often enjoyed due to the influx of great role-playing games. It was really all I played at the time.
But many will say this is a more expensive hobby than ever before (which I'll take issue with for a variety of reasons, but I won't get involved in that now). If they think it's expensive, and Microsoft and Sony launch decidedly pricey consoles, how long will it be before you're a multi-console owner next generation? Maybe the higher prices are generating more ardent loyalty among the gamers; picking sides means you eliminate a lot of fantastic games due to exclusive titles, but it also means you logically save money. So maybe some people will simply own the platform they believe will get the most use.
It'll also be interesting to see if Sony and Microsoft make some changes in the new generation; for instance, if either of the new systems in question take a different approach to the hobby. Maybe it won't be all about more power and fancier graphics; maybe they'll try to do something a little different. Well, that would mean you'd have to be a multi-console owner, right? Can't miss out on entirely different experiences. …then again, I have zero intention of getting the Wii U and that's a different experience, so it probably depends on a bunch of different factors.
So based on how you see the next generation shaping up, what do you plan to do? Will you own more than one console? Or are you just going to stick with the one that is likely to give you most of the games you enjoy?