No cloud service in my workshop, my JollaC contains workshop manuals and parts catalogues for my various vehicles.

No cloud service in my off road toy, when I'm several miles up an unpaved lane and need high resolution mapping. My Nexus 7 (which never sees the internet) has a great GPS, and (I grudgingly admit) some decent mapping software, but the poor thing is bulging with the map data onboard. If it had more space, there would be more maps on it

In truth I could get by with less, but more means (a) I can be lazy about sorting whats needed and what isn't, and (b) one device can be useful for more tasks at the same time.
The Nexus 7 is pretty good as a mapping solution, and as a workshop reference, but it can't be both without more storage.

Excellent use for a tablet for me is as a pdf viewer of technical data. Even when sat at my desk, with three monitors in front of me, it's sometimes useful to be able to refer to a document without disturbing the work in progress. In the office or at home I can obviously use the wifi. At a customers site, or in my workshop, or on the road, that's not an option. Even with 4G it would be impractical, requiring VPN into my secure server for confidential data, with the limits that come from having the server connected to rural broadband services.

It's a shame the larger format Kindle device (DX?) never went any further. A large format epaper display with enough horsepower to handle pdfs without effort, simple console for ssh or telnet sessions, uSD card reader and a decent battery life, would be very close to the top of my shopping list.