I think you will see more and more games going digital, just like comic books are making the transition (slowly). Think of the benefits of being able to simply pick the pages you need, such as specific creatures you're using in a campaign, or the option of just printing out a module on demand, all in your computer, to use, mark up, and print again. I do this with digital versions of LOTR. The PDF's may be protected, but rest assured, there will be young, inquiring minds that will hack and snatch it for their own use...which might be why, IMO, the main books could be held back.
What is disturbing, however, regardless of the print or no-print capability, is the price remaining the same. Why should that be the case, when there is no longer a printing cost, distribution cost, or warehousing cost? If you want more people to get excited, pass that savings onto your customers!