hobby cnc 15 years from now...

While not exactly CNC, this page discusses using lasers to write
super high density data (10 GB) on a roll of adhesive tape
(without unwinding it!).

http://www.villa-bosch.de/eml/english/research/optimem/optimem.html

It has many similarities to our hobby, but very much higher resolution
(1 /1000 mm). Enjoy.

Doug Fortune