Imagine you talking to your iPad in public, then waving it around taking pictures.
Welcome to the 21st century! Computer! Activate holo-deck!!!
That's probably why the iPad appeals to me so much; I'm a Star Trek fan and it reminds me an awful lot of a PADD. Heh, I bought my first flip phone because it reminded me of a communicator.
Hmm, maybe they could fit some basic phone features into an iPod nano and we'd wear it as a TNG comm badge.