Microsoft employs 135,000 people world wide. Now image if every employee was forced to both buy one and tell all their friends and family to buy one? See below a typical Microsoft employee family reunion.

So if every Microsoft employee buys a Kinect themselves and then bugs all their friends and families to also buy Kinect you'd get a lot of sales, right? It'd be easy to predict 3-5M sales on such a short time period past release when you know that every Microsoft employee worships Developers, Balmer and Microsoft technology.
Now that doesn't account for all the sales, theres an important 2nd component to Kinect sales as well. After Nintendo completed their dumbing down of gaming, they made a large group of people so dumb they couldn't actually figure out how to use a controller. They created a part of the market where one didn't exist before and Kinect is simply exploiting this new market which Nintendo created but are too proud to go after themselves which is why they turned down Kinect technology.
Sony on the other hand couldn't rely on their large numbers of employees because they are like most Playstation fans in general, disloyal bastards. So they couldn't count on people buying their magestic controller as most Playstation fans would rather buy 3rd party stuff over stuff that Sony makes, hence the reason why most Playstation fans don't actually own Playstation 3s.
Instead they had to rely on a niche in the market. They rely on people who are smart enough to use a Wii type controller but however are dumb enough to not realise that they should buy a Wii instead in order to get the true Wii style experience.
So overall with the large numbers of loyal Microsoft employees buying Kinect obviously Kinect will win out in the short term but in the longer term it is really up to Nintendo as much as Microsoft and Sony as to which of the HD motion interfaces wins the sales race. If Nintendo keeps producing content to dumb down the gaming audience then I believe obviously Microsoft will be able to keep out selling Move even after their employee friends/family effect wears out after Christmas. However if Nintendo doesn't do this then Move will eventually pass Kinect as the number 2 controller because given the Wii's overall sales numbers there are probably more people like this now than there are people too dumb to use a controller.
Tease.









