Project natal PS3 killer? or 360 killer?

[Kantor]

ramses01 said:

Kantor said:
I think people are overestimating Natal. Sure, people are excited about it now. But then it'll release, it'll be expensive, it'll be ignored. At the end of the day, no amount of advertising or celebrity endorsements will make consumers buy something they see no use for at a ridiculously high price (what was it finally, $150?)

The PS Motion won't do any better. Actually, it'll do much worse.

I am completely baffled by most posters vast underestimation of NATAL.  Of course non-linear and strategic thinking (hell thinking of any sort) is not a strong suit of most people. 

Of the posts that I have read, maybe 5-10% don't vastly underestimate it, and MAYBE 1% have a reasonable expectation of the impact of NATAL - assuming a. MS delivers on its promises and b. it is bundled in every SKU at today's prices and available as an add-on for under $100 with a game.

I am asking what can be made with Natal and how it is better than the PS Eye, and I get the responses "Natal can make all kinds of stuff if you have imagination!" and "Of course it's better than the PS Eye", which leads me to believe that you really have no idea.