I don't think it's a failure as another entertainment option. The Wii alone speaks to that. The issue I see is more around some expectations that everyone would like it (clearly not going to happen) or that all games are automatically better with motion controls (also clearly not going to happen).
I think that currently - and in fact for the foreseeable future - motion controls will (arguably should) be relegated to two clear uses:
- only for games that actually benefit from the control scheme and approach
- only to augment games using other control schemes in tandem where the game actually benefits from the augmentation
Good examples for me:
- playing Table Tennis with motion controls vs a keyboard or gamepad is actually superior. This is good. This means the scheme really fits the game and we're getting the best control experience and the game benefits in terms of fun and involvement. EyePet with motion controls is better for example than EyePet without motion controls
- augmenting an FPS with lean using the Move or Kinect camera (note this hasn't been done yet). One thing I hate about console FPS (and certain PC FPS) is the removal of lean, which is actually I'd argue an option that such titles should have. If, while sitting playing with my gamepad, I can come up to a corner, stop, then simply lean slightly to the right and peek out I'd say the game experience would have been improved a fair bit
Of course, the challenge is developers want to make money and there is the double challenge of
- being able to identify games that would be better with motion controls
- refraining from using them because you think it's "hot" or the in "gimmick" when you shouldn't
Now, sadly, clearly a lot of developers who hadn't thought about motion controls where thrown by the first point, as the Wii's third party support made all too clear. It was a case of copy Nintendo (who had worked out some titles that worked) or try lots of stuff and see what works/doesn't.
I'd also note I think that, due to what I'd argue are false notions about sales potential, I still think too often titles have motion controls shoved into them. It might be fun for a bit, but the just released Joy Ride on Kinect is clearly such a title. Kinect is simply not the best control option for the title, and it smacks of let's do it because we want to have this on Kinect rather than is this best for the end user.
Sadly, the above has lead to a lot of failures for third parties with motion controls, only making the situation worse.
However... I'm actually glad to see motion controls on all three consoles now. With this kind of parity - i.e. I can go motion control on all three where it makes sense, or ignore motion control and just use normal controllers - I'm hopping that we see more common sense used and the best control scheme used for each title without the feeling that motion controls have to be shoved in somehow.