Certainly there's pros and cons both ways. My biggest fear is that if Amazon folds, what happens to my e-books? Do I have to go through the great lengths of having to recover the files on my tablet and move it around to other devices and possibly look for other e-readers to read them with? But certainly there are a lot of convenience right now attached to having electronic copies.
I wish I can have the right to purchase a paper copy for a significantly reduced price if I already own the e-book.
Amazon.com will probably never fold. They are becoming a lot like Walmart IMO.
You have to understand that brick-and-mortar places like Best Buy, B&N, Sears, etc are probably going to all close soon enough.
You just cannot compete with online prices.
Best Buy should probably do an online-only model and compete with amazon.com on prices, but I think it might be too little too late at this point.
Paper > ebook editions everytime.
The reason is the ebook versions are almost always inferior, especially when it comes to translated works. There's lots of grammar problems, syntax, and just a lot of other errors.
Just look at some amazon.com reviews on popular books in the Kindle format, all I see have been uniformly 1 star reviews.
Anyway I'm sure there is a comparision on some blog out there, but I don't have the time. Gotta go.