While I haven't done a lot with the idea (one month of concentrated work a few years ago, before LLMs), my idea is: the stylus needs to become way more digitized. Keyboards and trackpads are fine, but a computer that understands intent based on how we squiggle, that will help us to get out of our confined way of thinking.

I used to have hacker news web pages that I scribbled upon with a stylus.

Web pages should feel more like paper.

But I'm currently not in a position to work on something like this because I have a pay check to earn. The pay checks that come out of university aren't good enough.