• I primarily use it to work with a pencil to be able to take notes and ideate (by drawing and writing).
• My wife uses it for creating digital art -
https://twitter.com/sh_aye_/status/1290166470408691713
• If you use macbooks, you can use it as a second screen that connects seamlessly. Handy if you're working remotely while travelling but not otherwise.
There are a bunch of other things you can use it for, but none worth the investment.