I'm thinking of remaining a Wii/DS/PC gamer for at least 2 more years, then maybe will get a 3DS if there's a cool revision out and the games are there. They probably will, as MK3DS will have come out by then, Super Street Fighter IV 3D will be dirt cheap and there might be a new NSMB/Rhythm Tengoku/Ouendan.
Failing that and/or if I don't have much money, I'll probably still be playing mostly on my Wii (platformers for life + Rhythm Tengoku + maybe Zelda + maybe DQX + Monster Hunter 3 + Zangeki) and on the PC. Minecraft will be so awesome 2 years from now, and I'll probably get the latest Mount & Blade as well. Might buy Diablo 3 at some point too, not sure. I'll have to buy DQIX at some point too, looks awesome.
Yes, pretty much all the games I mentioned for the Wii and DS have already been released, but I don't buy many games a year, and I was cured from the day-one-itis.
On the offchance Nintendo really gets it right with the Wii 2 (like, not making ultra-retarded choices and actually following up on their promises this time), I might get that too. I'm doubtful that Microsoft/Sony will bring something that caters to my tastes, but who knows. The PSP2 certainly doesn't.