I wish you well. There's always a chance you'll be right. You have a good chance of being right in the USA. Less so in the rest of the world.
There could be the rather odd effect of PS3 poisoning the well for 360. If the wand seriously flops then this might just put people off the Natal and steer the motion-curious back to an established and already successful model: Wii.
Compelling software is the only way for Natal to push 360 over the top. I'm more likely to become a true believer when you can turn your bullet point 2 from a vague promise to some concrete examples of announced software with published release dates.
But I've learned my lesson not to mock ambitious predictions... 3 million MW2 sales on PS3 week one, what an insane claim that was.
“The fundamental cause of the trouble is that in the modern world the stupid are cocksure while the intelligent are full of doubt.” - Bertrand Russell
"When the power of love overcomes the love of power, the world will know peace."
Jimi Hendrix