I think the best solution is for a game engine to develop it's own import/export plugins for a few of the most popular formats, and list the version of those formats supported
Yes i thinhk also it's the better to do.


Now all the people who spend all day making the best damn bananna-cream pie get all frustrated when they can't actually import their pie because the game eninge doesn't recognize banana-cream as an actual 'pie'...mmmm....banana-cream pie....

...ok, gotta run to the store now! C'ya!
Ahhhaahaaahahaaaa

The videos are cool, but any engine have already that style of physics.