Namco just shot themselves in the foot.
I don't know how much the rest of you know about Japanese culture (I'm an expert), but honor and shame are huge parts of it. It's not like in America where you can become successful by being an asshole. If you screw someone over in Japan, you bring shame upon yourself, and the only way to get rid of that shame is repentance.
What this means is that the Japanese public, after hearing about this, is not going to want to purchase Tekken 6 for either system, nor will they purchase any of Namco's games. This is HUGE. You can laugh all you want but Namco has alienated an entire market with this move.
Namco publicly apologize and cancel Tekken 6 for the 360 or you can kiss your business goodbye.