In regards to all of this being obsolete in a couple years, I disagree (for my purposes).
When I first wanted an MP3 player 4 years ago, I chose the Dell Digital Jukebox over the ipod because it was over $100 cheaper and it had 16 hours of battery life (I think Ipod had about 7-8 at the time). The main purpose for this was so that I can bring my entire cd catalog to work and listen at my desk, and I still use it to this day. It's obsolete in technology terms, but it still functions well and is put to great use.
My computer (a Dell) was purchased over 6 years ago. The hard drive crashed twice (and were replaced), I added more ram, a dvd recorder and an LCD laptop (free from work), but the computer still works very well. 6 years is beyond ancient in computer terms, but my system works too well for me to replace it. I keep thinking "one more year and I'll get a new one", but after a year I still have no need for a new one.
So while my version of the ereader (500 model) will be obsolete in a couple years, I'm confident that it will still function for its main purpose: to read books on. I'm confident that in 5 or 10 years, I'll still be able to buy a new book and put it on the device. Maybe it won't be in sony's format, but I'll have software that can convert it with ease.
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