4K virtual console?

This should be obvious to anyone remotely familiar with the hobby. 4k is expensive and not common enough to bother with.

Yeah, that's another thing; besides the sheer power required to render modern games in 4k (like I've said, even my monster rig isn't really good at it), there's also the small market penetration on 4k TV's yet. I literally don't know a single person who owns a 4k TV yet. Prices are just coming down and it'll be another 2-3 years before we see any larger amounts of proper 4k content. Besides a handful of Netflix shows, upscaling and any monster PC's with ditto displays; 4k just isn't a thing ready for mainstream in quite some time yet. Full HD has only settled a few years ago.

4K TVs are pretty cheap already, in a couple of years probably all new TVs will be 4K standard. It doesn't have to be 4K or bust, there's a host of resolutions above 1080P and between 4K that can be supported.