That's what he was trying to do at Xerox and Apple.

Without the resources of a large company, the Dynabook will get Pyra levels of adoption and be quickly forgotten about. And no large company wants to take that kind of risk nowadays. Not when there's money to be made pushing "apps" and monetizing eyeballs.

AR / VR might be an interesting place for the ideas.

I'd bet someone at VPRI is porting Croquet to the Oculus as we speak, if it hasn't happened already.