eInk tablets are the future and confer all the advantages of pen and paper. Perhaps they need to undergo a few more generations of UI improvement, and the eInk company itself needs to have its patents expire so the tech isn't held up, but the experience is real. It's tactile, vibrant, and smooth. Battery life is never an issue, even with wifi.
The advantages of having notes always with you and being able to organize into folders and move sheets and figures around beats paper a thousand times over. Highlighting a figure, dragging it to a better spot, rotating it to an affine angle to give it life, and then resizing it to double size is an earth shattering experience.
Erasing, also, is finally a first class experience in a way it can never be with paper. You can even re-sort lists of items with ease.
I'll never go back to pen and paper.