Remember way back when nintendo was being super secret with the wii, for they knew they had a "revolution" on there hands? Well, since then motion control has been put into all sorts of game systems and handhelds.
Pop Quiz: Name the most successful handheld with motion sensors?
Answer: enohpI (text reversed)
What is the point you say? This technology starts off as toys and soon gets put into everything.
Get them in early, huh?