The Quali-TV QS 1080 (which I hadn't seen before you asked this question) uses an MPEG2-only decoder and just supports QPSK reception.
I am not aware of any commercially practical solution for MPEG4 HD and MPEG2 HD that supports 4:2:2. But as all official broadcasts are in 4:2:0 it has never been a problem. But I know people like to pick-up SNG feeds in 4:2:2, so fair enough, but we can't make a product at an acceptable price.
Bob