Last year I wondered why print books didn’t come bundled with e-books. Today Amazon announced Matchbook: for a limited add-on price, ranging from nothing to $3, you can get e-books of print books you’ve previously bought from Amazon.
At least for me, this is a substantial incentive to buy books there. But I think my use case is kind of weird: I bought a Kindle but don’t like it and never use it, and read e-books almost exclusively on the phone. For me, “the book I’m reading” is almost always a print book, while the phone is for reading random bits of things a few minutes at a time. But it would be nice indeed to have the print book at home enhanced with the option of reading a few pages by phone over the course of the day.