I have found one of the best uses of the iPad in a workflow – using it as another display which can display lecture slides, codes and other useful information while you get work done on a laptop.
I find it particularly useful for iOS programming where I can have Xcode open on the Mac, with the lecture notes open on the iPad. Sure I can open the notes on the Mac, but having it on the side makes the workflow less cumbersome. Just a few glances and its done.
Still trying to work out how to use Core Data though 🙂