TBH current Kinect appeared very late in the consoles lifespan, and was an optional extra. Which means many developers wouldn't bother with it because maybe 10% of Xbox owners might have one, and of those 10% maybe 1% might buy their game. So it's not worth dedicating development time to.
Now that it's actually part of every single Xbox One console, developers will be able to add features and content safe in the knowledge that everyone who buys their game is going to be able to use it.
There is what something like 77million xbox sales to March, at least 24million Kinect's have sold(I think its closer to 30mil now). Considering the people who bought Kinect WANT Kinect games, you have a freaking HUGE install base for Kinect based games and ZERO useful product. When you factor in how many of those 77million are people buying a 2nd through 5th Xbox for many reasons, newer quieter boxes, older xbox died, pirating and wanting a "online/newer legal one", etc, etc. The number of that 77million sold that are actually in use by people continually buying games is dramatically lower. We're talking about probably at least 1/2 of current Xbox users having Kinect and yet basically 3 years later zero signs of quality kinect using games.... likewise we have basically zero signs of kinect using 360 games that are upcoming and incredibly few really heavily kinect using X1 games being showcased.
Install base has been there for 2 years, 10mil sold in a matter of weeks and most games sell much less than 10mil, the users and hardware has been there for 3 years and yet kinect is almost completely unused.
Nope Im dead serious the Kinect as a piece of technology is ****ing awesome, how its be utilised so far is so poor. Looking at the Kinect games for the next Kinect just demonstrates that even more, it seems MS has no developers that can really think outside the box...
THe hardware is interesting and at first conjures up many idea's for great usage.
But ultimately how can it be used effectively alongside any AAA title which wants accurate input? Racing game, holding two arms outstretched for hours with unresponsive inaccurate driving... sounds great. Use a control for accuracy and what take your hand off the control to wave your arm to shift gear.... its just not feasable.
I've seen very little usage and I've seen very little in way of out of the box thinking that would make for good usage.
Kinect makes us all think of making real movements in games, in reality its both, tiring, stupid, inaccurate and rubbish. It sounds like the next step towards holodecks, it isn't. Its motion sensing, which sounds cool but really isn't, isn't massively impressive technology and there is really no sensible way to make games use it well. Kinect only or controller only and there are few if any complex/aaa games I can think of that can work kinect only. RPG, racing, fps, fighting games, mmo's, RTS, none of them would work with kinect only, which is why no one is making them.
Kinect is very unlikely to ever feature in any top end full budget games in anything but an arbitrary, quick time event or voice control kind of way.
Voice controls ADD to what we can do with a control pad alone, kinect usage basically forces you to put down and stop using the control pad, its an alternative. But count the buttons on a control pad, d-pad, two thumb sticks, 4 buttons 4 triggers and start/select. You can't really do movement through kinect, not easily, which is why several kinect games are "on rails" like old virtua cop games holding a gun on a virtua cop game, faking real action prevents you being able to press buttons to move so it only works if the game is on rails and movement is controlled for you, but that means a heavily limited game.
All for kinect bringing better voice control additions, but those can be done through a $5 bundled headset not $100 added cost for something that only brings about crap games.