I don't have the box with me... But my brother just phoned and pointed it out.
He used to use PCM and it was fine... But today he bought a small Yamaha AV system was excited to try Netflix 5.1.
He just phoned and mentioned sound break up that he'd never had before
It is... You pay for it though!
But what I mean is the LIT does 4k HDR Netflix, YouTube etc... As does the Mi Box. Most the Android TVs have similar hardware, so that shouldn't be an issue.
But I don't know any cheap or even mid level box with Gbit ports