Yes, Nintenodo WILL be a factor. And it's because of all the Nintendo fans that only buy their systems. Not to mention, they have a download service for ll their previous console games, thus greating a nostolgia(Spelling?) factor. Adults will buy it just to re-live their glory days where they were in the arcade kicking ass and taking names. As for Sony's processing power, that may be true, but they have more floating point system power, not general processing. This is a little odd, since general processing is the easiest to program games on. Also Sony has the back library of two generations, where as Microsoft will only have one. But Microsoft has customizable consoles along with a new Xbox Live service.
Only time will decide a winner. I vote Xbox 360
Constantine