Behind the scenes we are using GPU tech originally developed for video game streaming, but using it primarily as a way to send a vanilla desktop.
We are currently delivering this desktop to any webbrowser using a JS renderer. That said, we didn't want you to have to have an old machine to use this one, so thats where the paperweight comes in.
VDI/remote desktops have been around for a while but they are usually really poor quality/hard to setup/etc. So we are trying to wrap that all in a simple package.