Remote desktop and Wake-on-LAN
Shan uses her iPad a lot, but a lot of the more serious (interior design) work needs to happen on AutoCAD or Photoshop. That is just not going to work on an iPad.
When we're travelling (read: holiday) she's carrying an old Lenovo ThinkPad 13 (great device!) just "in case" she needs to open AutoCAD and edit something minor or read the drawings/dimensions. But honestly, most of the time that device is turned off and dead weight.