Implementation versus actual use is a bit different. Those sixaxis controllers were supposed to offer new ways to play, but I've only heard them to be awkward, and people preferring to play their games like they normally would. This is why I question how well the camera technology would actually take off: bundling it by default doesn't make much difference if people still aren't going to use it, which was my point. Until Microsoft can prove its popularity outside of a few gimmick games where it's actually useful (dance games for one), there's not much we can say until we see a revolutionary trend in gaming actually shift.
Until then, it's all guesswork at best imo. We'll just have to see how it all pans out.
I haven't seen the Kinect Sports Rivals yet, just the trailer for it, but I did see a lot of gameplay for Fantasia Music evolved and it was quite cool. In fact it was so cool for a lot of people that it received one of Game Spot's Best of E3 2013 awards.
Here is the link... So, I wouldn't think a Kinect Only game would be a best of E3 for 2013 on a hard core gaming web site.
Not only that but it can be used for a lot of things, instantly scanning in QR (Redemption Codes), Used in the OS, Used in searching in the OS just by saying a word or words, Switching to games just using your voice, Skype at 1080p with phones, tablets, computers, etc.... That is a huge deal.
It's only the beginning and we haven't seen other game shows like gamescom. I expect to see more games for it over time.