The difference is the Visual 6502 team does it for fun. It makes me wonder what cutting-edge technology from today will be hobby projects 40 years from now. My

The difference is the Visual 6502 team does it for fun. It makes me wonder what cutting-edge technology from today will be hobby projects 40 years from now. My predictions: scanning tunneling microscopy, lots of genomics / molecular biology, "big data", some current cryptography, a lot of AI. And to reply to the parent comment - designing the calculator in the first place is much more amazing.