Look ALL companies do this, even if they don't admit it, even if they don't consciously know it.
Every time a technician discovers that a feature is too advanced, too expensive, or not compatible with a current iteration then they don't just discard it, they put it into the "product 2.0" pile.
The only difference here is Natal's team is naive enough to spout openly about this as if it is in any way a good thing, this is a BAD thing to talk about as:
-it makes people think Natal is not such a focused product
-it makes people think the first Natal will be a 'flash in the pan' to be quickly surpassed (so waste of money)
-it draws attention away from Natal 1 to Natal 2
Microsoft is REALLY new at this stuff, all around it is the newest developer in the industry, though it s an old company, remember they themselves did not make the Xbox 1, it was a mostly outsourced design and manufacture to Nvidia.
And especially motion, Nintendo and Sony have been experimenting with motion and other novel user interfaces for DECADES but Microsoft really hasn't even experimented with the basics, Natal is their FIRST attempt at a controller other than a run-of-the-mill gamepad.
I personally don't think they even got the 360's gamepad right:
-powered by AA batteries as standard... WTF!?!?
-Why does the battery-pack stick out like it was added as an afterthought?
-It's bigger and heavier than necessary
-why are the buttons so soft and squidgy?
-there are no special features to distinguish it from the competition (like motion or extra buttons)
-WTF is with the d-pad?
I think Natal is going to be a lot like that with a kind of "wow, overall pretty good but it's got a dozen little annoyances"
Microsoft are quite a good software company but in terms of hardware design they are playing serious catchup and IMHO they have a severely ineffective company ethos on all non-software aspects. The RROD problem is endemic of how inexperienced they are in the nuts and bolts of designing, building and quality control.