mmm. Well, you can make some guesses.
There are adaptive algorithms also, but they won't be able to adapt to sudden/unexpected noise (visiting guests all talk at the same time).
That sports champions video really demonstrates how difficult it is to get an intuitive game mechanic from a motion control system. The number of on screen prompts and help/option dialogs was pretty mad, although the pointing seemed to work well.
It'll be especially difficult for titles like that to distinguish themselves from Wii software. I wouldn't expect many people could see a difference.
Yap ! May be they go with the "adult" look to differentiate from Wii's kiddy look. I for one prefer the cuter, kiddy look. Consumers at large most likely don't care.
The Move Party demo at the end was clearly more enjoyable for the people playing. The simpler actions with clearer directions, more intuitive goals and the 'novel' virtual mirror interface clearly help enormously. Less abstraction, less confusion, more fun.
*nod* *nod* The simpler the better.
The best case is probably those games that are easy to pickup, yet take time to master.
That's why I like the table tennis game in Wii Sports Resort. Dancing is another obvious one.
EDIT:
That rafting/ricochet video is rather hilarious. There is no way any system could track them
Most of the time it shouldn't matter, but I'd love to see where PS Move breaks down. Those high res, high frequency specs look good on paper. It's difficult to internalize just how fast (or slow) they can track accurately.