Rath on 03 November 2009
No, I don't think it will sell a huge number of units (I would be surprised if it passed 2M) given that I expect it to launch at a high price and not be hugely well supported. However it will act very well as what I think Microsoft wants it to be - a way of lowering manufacturing costs and testing out designs for the next generation.
Basically whatever goes wrong with Natal they will try and fix for the next Xbox.
