This is basically optical write-only tape drive technology. There is literally no way to get to TB/cm2 using their technique (that's ~100 bits/linear um) using

This is basically optical write-only tape drive technology. There is literally no way to get to TB/cm2 using their technique (that's ~100 bits/linear um) using visible range light and spatial light modulators in a single layer. They reveal that their future system will use 5 um thick tape (good luck! that's half the thickness of Saran Wrap) so I assume the claimed TB/cm2 density includes a bunch of layers. That's fine, but the claims about 5000 year lifetime on 5 um polymer tapes with nm thick ceramic are pretty extraordinary (requiring extraordinary evidence.)