I get what you're saying behind the idea of Kinect but in execution Kinect didn't really work out too well. MS and other devs didn't seem to keen on investing too much money into games for it either, and some Kinect only games like D4 iirc also brought the option to use a controller.
For apps too I never had a moment where I felt like I needed Kinect to improve my experience, it was always just kind of there and I felt like there wasn't any serious push from MS to improve Kinect. So as a whole I'm not too sad to see it go.







