This is a pretty interesting find by Matthew Cassinelli. In a nutshell, you can handwrite notes on your iPad using Apple Pencil, then send that text (as text, not as drawn text) to a shortcut.
To see this in action, watch the video below and jump to about 2:12.
If you do a lot of handwritten notes, I can see lots of value here. Export the text to a shopping list, for example. Or, perhaps, append the text to a list of app ideas. I suspect you could even create a shortcut smart enough to figure out from context what list stuff should go to.
Of course, your success here will depend on how readable your handwriting is.