Help me wrap my head around this - Pininfarina ink-less pen

Apparently it has something they are calling an "ethergraph" tip that lets it write without ink or refills...which sounds like some buuulll-shit.

What gets me the most about the press release is how flippantly they say it doesn't require ink or refill...EXCUSE ME, I NEED TO KNOW MORE.

http://www.pininfarina.com/media/files/co...