Phones win
If you ride the bus every day, you don't need an analyst to tell you about mobile technology trends. I remember the point in early 2007 when suddenly everyone on my bus had an iPod. Seriously, I'd look at the ten people sitting near me and all ten would have white earbuds. Then in 2008 people started using more different gadgets for a wider variety of purposes: playing games on a PDA, watching movies on a PSP, listening to music on a GPS unit, reading books on a Blackberry. I also saw a number of Kindle owners, though I suspect that many of them were fellow Amazon employees.
In 2009, all of the electronics have vanished except for the phones. I guess once you have a reasonably capable phone-the one gadget you never leave at home-there's no more desire to haul around anything else. I see as many old-fashioned paper books as ever, though.