Personally I don't want the swiss army knife approach when it comes to my portable electronics. And there is one very important reason for that. Battery life. My mobile phone is dying. Again. (New battery didn't help this time).
It's bad enough that I can't expect my mobile to work unless it's plugged in to an external power source, but if that meant that I couldn't listen to music or read my books while out and about that would be so much worse.
So obviously I'm looking around for a new phone and what do I see? I can get really expensive phones with GPS, cameras and MP3. But I'm just not willing to shell out the money they want for these swiss army knives knowing how long (or not so long) mobile phones seem to last. And of course battery life is not just an issue for my dying phone, but say I forget to charge the battery (which have been known to happen) and none of my portables would be working. I shudder to think of it.
Of course with all the electronics I seem to be lugging around every day (MP3-player, Cybook, dying mobile phone, emergency book light in case my commuter train gets stuck in a tunnel
) I'll either get a strong back or a broken one. Maybe I should start to work out...
Sorry, I'm rambling, but my point is I'm worried about availability (and redundancy?) and prefer to have separate devices knowing that if one is unavailable (must remember to charge the MP3-player tonight) at least there are alternatives.