Far easier to swallow than a random number generator. If I'm ever dragged into the digital age of wargaming, kicking and screaming, i'd rather use these please.
Gonna get expensive for my 90 hormagaunt attacks though!
http://www.engadget.com/2012/06/07/dice-plus-digital-chance-cube/
Edit: I especially like the idea of the dice not registering 'short rolls' or as we have always called them 'drops'. Beware cheesers!
Also a 'is it cocked' gizmo inside the dice would be nice.