1. There are no games that take advantage of it outside of a Sony game or 2.
2. Too expensive of an add-on.
3. No one is going to want to play these games in 10 years.
4. Broken experience, requires too many add-ons to get the full benefit and to play every game type.
5. Regular gamepad would work better.
Maybe one day developers will stop sucking ass and will take advantage of motion controls properly. I mean the hardware is ok, it's just a joke right now...
*Note: I am in the industry. I qualify for industry credentials every year for E3 with the business I own. I am a developer of games and apps in my spare time as well. Therefore, as an Indie dev, I am qualified to make such statements (even though I have not developed games with Kinect, Wii Motion, or PS Move hardware).
IMO