SGX is one of those things where 95% of the time the actual motivating use case is evil DRM and frankly you have a very well motivated world of hackers desiring to break it for all sorts of different reasons. My gut feeling is that it fulfills a purpose of making a mid level manager somewhere get a bonus, potentially marginally increase the efficacy of a DRM scheme (e.g. blue ray video -- all official players require windows and run on the TEE) and any actual "good" use cases are somewhere along the lines of good incidental marketing, including the cloud computing ones...