I don't know about you, but I don't learn as well from reading and studying online. When I first learned how to use my 3D animation software in highschool, I read the manual cover to cover multiple times (600 plus pages). I got to the point that I could flip right to the section I needed to reference by feel. I could also study "offline" on the bus, or sitting outside in my treehouse or hammock.
As the credit at bottom of this Guest Editorial says, "Arnold Schwarzenegger is governor of California. He wrote this article for the Mercury News." [or at least signed it after staff wrote it].
It says what the administration envisions but an op-ed from governator is nothing like a white paper from the IT sector that is developing the plan. :/
He doesn't really talk about how these digital textbooks will be accessed.