Today I tested NoMachine. This excellent (and free!) remote-desktop software solution allows you to control one computer (e.g. a Windows PC) from the desktop of another (e.g. a Mac), using secure network connections.
It works well, even across Wi-Fi connections. It allows you to, e.g., make adjustments to VST GUIs in NetVSTHost (or NetVSTHost's own GUI) from the screen of your Mac or Windows client computer, without having to have the NetVSTHost PC physically close enough to use a directly connected monitor.
BUT, it does interfere with NetVST connections a little. AU Lab on the Mac reports occasional "overload" conditions, meaning that the PC is not able to provide new blocks of audio fast enough.