@Xelloss,
So your saying the market for the Wii has dried up so MS is only trying to sell the Natal to people that already own a Wii. MS is not going after the people that already purchase a Wii.
They will now be offering a console that does what the Wii does and much more. Some people that havent picked up a Wii yet, but are interested may just change and pick up a 360 with Natal.
If the mainstream media declares the Natal as hot stuff next holiday sales of the Natal will be huge even with people that havent picked up an Xbox 360 yet or maybe wouldnt have.
Its libraries that sell systems not a single game.