Mainly because they are still expensive, see https://news.ycombinator.com/item?id=29471706 https://news.ycombinator.com/item?id=29471706 It would probably be c

Mainly because they are still expensive, see https://news.ycombinator.com/item?id=29471706 https://news.ycombinator.com/item?id=29471706 It would probably be cheaper to put OLED screens on each face of the cube (MIT media lab did one a few years back). But anyone doing a successful crowdfunding one would be indeed cloned as a throwaway commodity on AliExpress in a few weeks, probably before they ship theirs.