It was similar project, there were forks and patches for that, have to find it on old HDDs.
http://vmgl.sourceforge.net/
On WWW is only initial attempt, but remember it worked using TCP(or maybe UDP), special Qemu device and SHM. It simply evolved, but somnebody have to find patches.

BTW,using local socket shouldn;t be hard. But why use TCP instead of UDP?

And running OpenGL over TCP is nothing new. It's like old GLX (used for many, many years), which stands for GL over X, and X for many years used only TCP (one of X features[in MainFrames times] was Network Transparency).