I tried to get my former employer to adopt iPads in lieu of paper-based routers and work instructions. (lean effort in manufacturing environment). IT would not budge, so I bought an iPad myself and created a proof of concept - warmly received by everyone except for IT.
After that started to use it in place of a notebook, and have since fallen in love with the display and realized what other potential this device has.
Edit: One of the biggest advantages I found using it in the workplace is sleep/wake times. For me to shut down or sleep my laptop before pulling it from the dock took 4 minutes every time. Switching locations with the iPad takes just seconds to sleep / wake and resume work.