Google Play Store also do digital refunds for apps, but i think that's more of an compatibility issue seeing variety of Android devices (with different specs) on the market. But you still have a couple of hours (you can quote me on that) also to request a refund.

I think most people are okay with Amazon Echo and Google Home because it just listen in on voice. Kinect on the other hand has a camera and people may not like Microsoft seeing them half naked and/or jacking off in the privacy of their own home