Calendar laser-etched into thumbnails

Back in 2007, Bre Pettis etched a calendar into his thumbnails with a laser cutter. I'd love to gussy up my digits before a night out on the town with some etched bitmaps. Sure would be smarter than a boring old man-manicure (and it'd be great for cheating on exams). Why is this technology not ubiquitous?

A Calendar Laser Etched Into Fingernails (via Sciencepunk)