I think some of those are pushing it quite a bit... Printed books aren't going anywhere in the foreseeable future (and I'm pretty sure all young people know wh

I think some of those are pushing it quite a bit... Printed books aren't going anywhere in the foreseeable future (and I'm pretty sure all young people know what they are, even if they're not really into reading); the (Exchange-connected VoIP) phone on my desk at the office still has a handset shaped exactly like the icon; and what kind of magical sci-fi world does the author live in where no mechanical device requires gears any more, or where wrenches aren't necessary for basic home repairs?