I saw a few of the videos and the main points I noticed are - It looks really good - It can be updated quickly - Black is produced with particles attaching t

I saw a few of the videos and the main points I noticed are - It looks really good - It can be updated quickly - Black is produced with particles attaching to tiny lenses - The faster you want to update ("video mode"), the slightly higher power consumption will be - It's cheap and easy to make with mostly LCD processes - It was supposed to launch in 2020 Unfortunately I haven't seen any update since then. Does anyone know what's holding them back?