This was my gut reaction as well as an eInk enthusiast, but I think the author is looking for something quite different. As much as the rM is a calmer, slower-paced device by design, it's still a device with a screen that doesn't have the same physical affordances and spatial flexibility as pieces of paper.

Remarkable is it though. where it wins, is that I can select an arbitrary region, and copy and paste and resize. Can't do that with pen and paper.