As I mentioned in class the question of lab notebooks in the digital age is at an evolutionary stage. Not sure where it's going to settle out. Here are a couple of discussions from thoughtful folks about their experiences with digital notebooks in recent years. Both of these have links to follow to other thoughtful discussions.

Digital Lab Notebooks: What works and what doesn't : Heather Whitney in The Chronicle of Higher Education

Electronic Lab Notebooks: Erin Bedford in Inside Higher Ed