Granted, this looks cool, and I'll show it to my kids, both of whom have TI graphing calculators (required for school). But from an educational standpoint, would we be better off saying goodbye to graphing calculators, and hello to something like jupyter? There are still some issues to deal with -- I would not try to use jupyter without a keyboard, and it doesn't run on Android or iOS right now. Surmounting these issues would be pretty cool.