Ok, I now have permission to talk about this project in full and in public. I'm working with Alan Kay to build six replicas* of a Xerox PARC Alto display for use in a museum exhibit**. Visitors will see a real Alto and then walk over to one of the replicas to futz with Smalltalk '78***.
Here's a nice writeup of a different project that rejuvenated an actual Alto.
arstechnica.com/gadgets/2016/0