I think the Kinect 2.0 feature set is greatly undervalued. I quite literally use the Kinect UI features every day, and find it well worth the money I spent, even if I were to never use it in-game. (I do, though not super often.) There's three reasons I use my 360 about 4:1 over my PS3 - Kinect, controller, and my personal friends list.
2 very simple examples of why Kinect has become important to me:
1. I have dozens and dozens of games on both my 360 and PS3 in libraries. It is by far the fastest and easiest to find a particular game and get it launched on the 360 using Kinect functionality. "Xbox, Bing Worms" "Xbox, Play Worms". Done. No scrolling, no searching, no anything. Yes, if you have two games, it doesn't matter. But when you have lot, it does...especially if it doesn't start with A or B.
2. I stream media on 360 exclusively in my home, because from anywhere in my loft except the bathroom I can operate HBOGo and Amazon, my primary two streamers, using just my voice. So when I'm cooking or cleaning or laundering or whatever, I don;t need to go to the controller, or wake the controller or use a remote, and it's incredibly freeing and effective. I love it. Now the caveat is, I don't have kids running around screaming, and my place is pretty soundproofed, so I have no Kinect voice problems. But the 2.0 seems to be solving the reported issues further, in terms of background filtering and identifying primary user, etc.
I realize many of us on GAF are like "Games and only games. Screw everything else." But it's really not the truth. Anyone who's fumbled around in horrible UI interfaces, either on consoles, mobile, any OS nightmares, etc. knows the value of a functional, effective and efficient UI. To me, that's worth the price. I'm thrilled to be able to run my cable box the same way. It's the whole reason I pre-ordered the system versus waiting for more software later. (Though in fairness, I pre-ordered both.)