The cameras are swapped yes but what this means is instead of one camera in moves case you have a camera per wiimote so for a 4 controller system you have 4 cameras whereas with move you have one no matter what.
To match moves functionality the motionplus addon needs to be bought as an addon for each wiimote. Once you have this each wiimote needs its own inbuilt camera which is above and beyond the materials needed in move. The built in battery adds cost to move but could work out cheeper for the consumer overall. Cost of bulb woud be an additional cost for move. wiimote has a speaker.
The move setup actually becomes better value the more controllers you add.
It still does not match the functionality though which is key, you should be looking at value rather than cost.
Things like this are not possible on Wii. Its easy to see them as essentially the same things but this isnt the case.
The demo was pretty cool, but I have feeling that it isn't something that couldn't be done with Natal (at least parts of it).
I wonder if Natal would add accessories like finger gloves that would allow the camera to read them easier for a similar or better interface ala Minority Report.
I like how creative the demo team were when thinking outside of the obvious implementations. I'm still more interested in motion controlled outside of games than within games.