> And considering this seems to have only appeared around 2015 (a good five years after I was musing about the concept), I really should've explored things furt

> And considering this seems to have only appeared around 2015 (a good five years after I was musing about the concept), I really should've explored things further. If the author had, they would have discovered Hiroshi Ishi's ClearBoard research from the early 90s[0][1]. Having said that, I love the solutions he came up with. Very clever and making good use of tech available to everyone. [0] http://tangible.media.mit.edu/project/clearboard http://tangible.media.mit.edu/project/clearboard [1] https://web.media.mit.edu/~ishii/CB.html https://web.media.mit.edu/~ishii/CB.html