I bought three products from Rogue Games at Gen Con. After I bought Shadow, Sword & Spell, the folks at the booth had me fill out a form so they could email me a pdf copy of the book after the show. That a pdf was included with the physical book was one of the big motivators for me to go back and get copies of Thousand Suns and The Cursed Chateau. I received the emailed pdf of SS&S a few days after the show, along with coupon codes for the other two at DriveThru RPG. I've now downloaded all three, giving me print and electronic access to these books.
I have since learned that Rogue Games is one of the publishers involved in Bits & Mortar, an initiative to give away free pdf copies of game books when you buy a physical copy of the book. Evil Hat and several other small publishers are also involved in this.
I love this program! I just hope that game stores will see the benefits and jump on board.
I have been a big fan of the pdf revolution since its inception, and I have quite a large collection of pdf-only game books. Using pdfs makes it easier for me to prepare a game, since I can use the search features of the pdf to find information quickly. I can also print portions of the book for reference.
I still prefer a printed book at the table, though. It's much easier to hand a player a book and say "flip to page 53" than to try to do the same with a netbook. Having a bound game book also makes it easier for players to flip through and read rules during lags in the session. A bound book also prevents the inevitable loss and reprint of the equipment list.
In the past, I've either had to make do with one or the other or somehow justify the cost of both. Now, with the publishers involved with Bits & Mortar, I don't have to choose. I encourage you to check out these publishers and point your FLGS toward Bits & Mortar.