Peggy Hageman from EContentMag.com:
Was 2012 the year of the ebook? Or will that title ultimately be reserved for 2013? There's only so much "exponential growth" an emerging industry can sustain, but when and where will sales level off? We'll have to wait and see, but ebooks have energized traditionally flat trade book sales. Impulse buys are far easier with web-based ebook sales, which have the added bonus of instant gratification.
Even as 2012 comes to a close, new questions are popping up. Will Amazon become the Walmart of ebooks, effectively choking out mom-and-pop retailers? Walmart, which decided to stop carrying the Kindle devices, seems to be worried about that possibility. Even if it turns out to be true, it's not going to be in 2013. We're still firmly in the growth period, and I'd say we've got another couple of years before this bubble bursts. Enjoy being able to use the phrase "exponential growth" in reference to the book publishing industry while you can!