I also bought an XB360 at launch and it's been sitting there too (I'm thinking of just selling it now). Oblivion is great, but there aren't very many must have titles at the moment. I feel like it won't get very much attention from developers in three months time.
The PS3 on the other hand has everything I want; it can play BluRay, as well as games. Plus, PSP connectivity sounds interesting.
Surprisingly, this is coming from a fan of Nintendo and Sega for a long time. I'm a bit weary of the Wii because I want to see if developers actually implement the Wiimote or whether they will be too lazy and go with standard controls.
I don't know; when the PS2 first came out I didn't buy it. Eventually I did buy a PS2 but only had it briefly. I did buy a Gamecube at launch, but I later regretted it as there were basically no games for it. Eventually I just sold it.