You can already have an arbitrarily-powerful instance do the heavy lifting in these cases. Cloud-based instance, if you want to do it on someone else's computer. The first time I've seen it (not used it, though), Sun workstations were still a thing. There are various tools to do distributed compilation with various degrees of smartness, though I'm seeing them in action less and less often because, quite frankly, Moore's law has made them more and more unnecessary in the last 7-10 years.

VNC isn't the right way to go in these cases. If a company is asking its developers to do remote work over VNC, and they aren't a three-person company struggling with financial and administrative resources, what they need is an IT manager and/or a build system engineer, not a web IDE. We already have plenty of IDEs that can't hold a candle to Visual Studio, the umpteenth one BUT ON THE WEB is pretty much the last thing we need.