Embedded Machinima

When id software introduced Quake3 embedded in a web browser via a plugin I asked how long before you could do embedded machinima: live, streaming, virtual theater where the audience does not have to have the same software as the producers. Or scripted machinima where the audience viewport and the actors inside are controlled with software.

Still have not found any yet but this example of web access to Open Sim is a step closer.