My mind is blown by the available functionality on the iPad and by how many of these apps I’d never heard of — Federico is using the iPad Air as his main computing device, and has built up a collection of apps to help support that.
In particular, I’m really impressed by how much workflow automation appears on his list.
I find using the iPad in a way that requires switching apps to be an exercise in frustration, especially compared to the ease with which I switch between apps on the Mac. Maybe these workflow apps are a solution?