> definitely one of my favorite devices of 2016

These devices are at least 3 years old.

Honestly, the fact that I can only erase the whole board and not a small section is a deal breaker for me. As is the form factor.

Make them as big as a small whiteboard, add local erase features and they've got a winner.

While we're at that, they could manufacture boogie board whiteboard replacements. That would be a hit in all teaching institutions. Imagine: No more markers or chalk. One click erase.