A modern-day HyperCard. Something that allows anyone who can just kinda-sorta program to make their own apps. We’ve regressed in this way from 20 years ago. 20 years ago most Mac users could build their own software with HyperCard — rudimentary stuff, often, but nothing is more satisfying than scratching your own itch.
Incredible answer from Gruber in this interview, 5 Minutes on The Verge, to the question: “What’s missing in technology that nobody seems to be working on?”
I’ve mentioned how much I loved HyperCard before. iWeb was a train wreck, but something like a revival of HyperCard could introduce a lot of people (particularly kids) to development, and the big hook today would be the ability to export your stack as an iPhone or iPad app.