(Disclaimer: This is not an endorsement for any organization, including eSword, Phoenix, Britannica, Amazon, etc.)
First papyrus, then Gutenberg’s printing press. And now, there’s the internet, which has many sites (alas, of varying trustworthiness) to view.
For example, the e-Sword computer program, provides commentaries and other great resources for Bible study.
While my time at Phoenix U (the popular online school) was short, I still get to enjoy the textbooks (and other library resources) they have. I am one of those few who would read a textbook for fun, and enjoy it. Some are directly viewable on the Phoenix portal, others must be downloaded. Still, it is invaluable, both for first-time reading and review. If I feel disposed to do so, I’d be more than happy to blog about updates in fields of such.
And of course, you got the Amazon Kindle, and Barnes & Noble’s rival (the Nook). This will make all valid books (which is only a fraction of all books out there) available on either format, and may lead to their print demise.
While I probably prefer physical books over an e-book, life goes on and print books are on their slow decline. The beloved Encyclopedia Britannica, for example, is only available online; print and CD/DVD versions have been discontinued. The online Britannica, by the way, is also available via Phoenix as well as the Community College of Philadelphia library.
And of course, there’s the pesky Wikipedia. (Need I say more?)
So whether you prefer the old-school (pardon the pun) physical book format, online reading, or a little of both, all learning and other reading won’t change.