TheJones - 3:54 pm on Jan 14, 2009 (gmt 0)

To be fair it is a slick effect when done properly. The problem is the added value doesn't really stretch beyond the gimmick. Therefore, these effects never really catch on. If multitouch wasn't so useful it would stay a slick iphone effect.
Also, from an instructional design point of view, there is a reason IKEA uses line drawings to show you how to put things together rather than images of the actual parts. Or a med student studies an illustration of the heart rather than a photo. Video introductions won't tell the user something clearer or quicker than well designed and layed out copy.
Just my two cents. I don't know your audience enough to completely write off the value in a high tech first impression.
Good Luck