I said it once, and I will say it again. As long as Sony and Microsoft duke it out, Nintendo will easily retain #1. Because the Wii has almost nothing in common with the other two consoles. If you studied history you'd discover the PS2 was the weakest console on the market, and it won by an insane margin of 114 million units worldwide! It's still freaking selling. Sony or Microsoft has to fail for one of them to stand a chance at obtaining #1. There's not enough market for both of them to surpass the Wii, and that's why Nintendo is #1 now, and will be for a while.