I've always been a reader. But like you, Jon (please don't faint), I find myself drawn to more varied subject matter now. I read a lot more "novels" than I used to, before I stuck fairly closely to my favorite genre-within-a-genre, cozy mysteries. (If you don't know what that is, go to
http://www.cozy-mystery.com , they explain it bettter than I do.)
However, as much as I adore my reader (past and present devices included), I don't think it's solely the reading device that has changed my habits. A lot of it has to do with the fact that information on authors and books and new releases is so much more readily available now than it was even ten years ago. For example, I have an extensive list of authors on my Facebook page, so I'm always up to date with their latest projects. Back when I got hooked on mysteries (thanks to my mother), we found out about new stuff by bookstore bulletins, or by sheer chance, or if we were really lucky, getting on an author's snail mail newsletter list. We had limited information, and therefore, limited opportunity.