And he is not alone: witness Project Phobos.
Phobos is a lightweight, scripting-friendly, web application environment running on the Java platform.
It comes with a set of plugins for the NetBeans IDE that cover the complete development process. These include a fully-featured debugger; wizards to help you get started faster; a palette of Ajax widgets that can be dropped on a page, thanks to jMaki; and the ability to generate a standard web application for deployment on any servlet container or Java EE application server.
Digging farther back in Steve Yegge’s archive, one finds he has been thinking along these lines for some time:
 Actually, I don’t know if it runs natively on PlayStation3 and XBox 360. But given the little-bitty interpreter and the great big storage media, the games could ship with their own JS runtime and not miss the space.