Still, from what I can see, it's the best device available barring Apple TV.
I've been searching around, but ready made there isn't anything that's better (on paper) and the DIY route, the only alternative I can see is LineageOS in the Banana PI. [1] AFAIK, that's not great because it doesn't have hardware acceleration, which for a device to do heavy media consumption in a 4K TV, is not an option.
I would be really happy to know about some better alternatives.