they was very wise, Natal has too much lag and inaccuracy to even bother considering, not to mention the power it will need to track up to multiple parts of up to 4 people at a time, now wonder all the demonstrations look bad.
now take sony's motion control for example it has no lag and is a lot more accurate, all they need is a nunchuck device and they have a potential to get a lot of hardware sales, hype will not sell everything...
it's the future of handheld
PS VITA = LIFE
The official Vita thread http://gamrconnect.vgchartz.com/thread.php?id=130023&page=1