I would love there to be a hands-on "History of Computing" class that runs through the history of computing (maybe starting in the 1970s?) through hands-on activities (through emulators probably) to give some perspective about how awesomely fast and powerful computers have become. This could also serve to expose where things have regressed (e.g. text editor and other UI responsiveness, complexity of the web stack). A version of this lesson could also be taught with video games to show though older games were visually simple, and just a tiny fraction of the file size, they were frequently just as fun.

Semi-related: I'd love to see a single video game that modernized the game experience as you played: Text mode only -> text mode + static VGA graphics -> 2D sidescroller -> Wolfenstein-quality -> DOOM-quality -> Quake-quality -> Half Life 2 quality -> modern-AAA.