You're the one to decide, eh? I've said it before, if anyone, especially burnbork and you, want to argue with me, use arguments, otherwise I can't take you serious.
Which of my arguments don't you agree with and tell me why. Are you able to do that? It's pretty easy to go "haha, lolol, look at this guy".
That stupid term "underpowered" is too often used by people, mostly fanboys, who let their favorite consoles compete in imaginary battles against each other, were the only deciding factor is "hardware power". In those battles it's the rule that the most powerful hardware wins, but that's not the reality.
The console market/the reality plays by different rules. The rules this time were that ppl wanted innovation and not overpriced hardware power. PS360 made a wrong choice by going for a 10 year lifespan, and I think we won't see such a plan ever again, so they didn't succeed in becoming the market leader.
Both of them were "overpowered" and too expenisve. The Wii had the right prize and wasn't "underpowered", in other words had just the right amount of power, and the perfect amount of innovation, that's why they got first.