I'm waiting till it goes down in price and tbh the launch games aren't really worth anything apart from maybe the FREE GT:HD demo. As for it being rubbish, that's no chance and to even compare the 360 to PS3 graphics wise at this time is absurd as noone can get the best out of a system in a first wave of releases. When the second wave are released about 2 years after launch then you can start comparing but right now it's just fanboys saying crap as always.
As for copying, Sony has always wanted to do something like the Marketplace, in fact I remember reading when GT3 was coming up for launch that Kazunori Yamauchi-san (GT producer) wanted to provide downloadable parts and features in the future of the GT series and other devs have said the same like Hideo Kojima of MGS fame. And the argument about the Wii is a funny one, Sony has had a motion sensor controller patent since 1999 but never acted upon it so yes the copied Nintendo in the timing but they never copied the technology.
It's all a waiting game to be honest and in the end it will come down to the games but I will say of GT5, enthusia 2 (please please please Konami!!), GTR (?) come to PS3 with full FFB wheel support from Logitech then the PS3 will become the racers choice again. I personally am just hoping that Polyphony Digital get their finger out and make GT5 the ultimate Gran Turismo that KY has always envisioned as Turn 10 and Forza are constantly raising the bar for the console racer.