I'm super excited about how the apple private compute cloud stuff works -- I tried to build this using intel TXT (predecessor of SGX) and then SGX, and Intel has fucked up so hard and for so long that I'm excited by any new silicon for this. AWS Nitro is really the direct competition, but having good APIs which let app developers do stuff on-device and in some trustworthy/private cloud in a fairly seamless way might be the key innovation here.