So, if I understand you correctly, Windows’ new “headless” servers are not actually headless, they simply have an invisible head – it’s still there, you just can’t see it.
It sure doesn't seem like it is there reading the page I linked.
I guess the software you mention that depends on having a desktop will do some combination of not working and working poorly, but they aren't targeting legacy applications with it, they are fleshing out their cloud offering.