Why the VNC reference (or RDP)?
What was described sounded more like Son of HTML with a basic (Lynx-class capabilities) browser-inspired prog to display it, preferably with limited (ideally zero) means of the client app unintentionally executing data as code in the now-fashionable way.
That approach would also have the side benefit (for end users) of *reducing* network and server load in many cases. Which wouldn't suit the vendors and their need for constant upgrades, but hey, I could care less.
Something has to come in between Web 2.0 and Industrie 4.0, surely?