My dream is to not have to manage my notebooks which have multiple subjects inside from front to back and even upside down and backwards.
Simply having to create a “new notebook” on my e-paper device for every new subject would be so relieving.
Of course, I would keep using regular paper as I need to be able to see multiple pages at once whenever I’m doing creative work.
But for note taking? Gimme an e-paper tablet 
edit:
To draw on an “infinite supply of paper” would be so cool too.