Adobe has spent decades worrying about color accuracy in their applications in every path it can take to your eyeball and they're not just going to screw up the last hop because it didn't occur to them to take the effect of whatever remoting technology they're using into account.

Based on the backlash over Creative Cloud, I don't think they really care.

Has there been backlash over color accuracy in Creative Cloud?

Because there are a lot of things Adobe might not care about as much as you'd like- but color accuracy is one of the things they care about A LOT.

(I spent a summer working in an art computing lab, nearly every minute of which was spent managing color accuracy)

I guess they are using VP9, which has 4:4:4 chroma subsampling: http://youtu.be/xo_R40C7RTo?t=3m35s

Correction: H.264 also has 4:4:4. If you see artifacts, that probably means it wasn't correctly compressed.