The popular desire seems to be for a do-it-all device, but the battery life in my individual gadgets is important to me, and I'm sure I'm not the only person who is like that?
I get told I'm in the 'boring minority' when it comes to mobile phones, but although smart-phones are huge and there's a lot less choice of 'basic' mobiles, they aren't going to disappear entirely, so why should e-readers?
Edited to add: but then again, what do I know, I don't see the point in having my Kindle play MP3s