I said ages ago that the iPad/tablets were solutions looking for a problem.
Then I changed jobs, and moved to an ultra-modern facility which includes not just video (SDI) cabling, but also single and multimode fibre cabling, TCP/IP networking and all the routing and switching kit that goes with it.
There are about 800 diagrams and schedules: 32 .dwg for the central area alone, and we have 7 TV studios, an orchestral studio, a radio drama studio, 10 edit suites and a post production and ingest area. That's a lot to remember, plus all the glue is newer than anything else I'd ever worked with, so that meant I needed the manuals too - they're mostly .pdf
Suddenly, I had found the problem for which the tablet was the solution!