Authoritarian governments (that is, what unfortunately all governments want to be) also love this, since if a few big companies control all computing, they can regulate them to control the public.

Fortunately, there are many computers already in the public's hands (which they can use to perform any computation without government restrictions and without paying/sending data to a company); but more and more people are switching to mobile platforms (and kids start out on these platforms) that I'm worried about the future.