There should be a "sticky" referring to Amazon Prime, Netflix and others as to they are
only available in SD (Standard Definition; 480l US) when using these unauthorized (by them) 'TV Boxes' (as the Chinese love to call these).
Too many are under the delusion they will get those in HD.
Upscaling from 480i to 1080p doesn't count, it's still SD just like playing a DVD!