My reasoning for putting this together is that I think it's really important for people to learn from what's come before, and the web is the most accessible place to do that. I've written a post[1] that goes into the rationale a bit further, and also addresses the legal aspect of this demo. Ultimately I would love for there to be an interactive online museum of personal computer history.
I'd also like to get a demo of NeXTSTEP working; for the OS which begat the world wide web to be running inside the browser would be pretty neat.