There are some decently powerful apps available, like Final Cut Pro, and there is multi-window support including external displays.

I think the percentage of iPad users actually using this level of processing power is small, but there are some ways to do it.

I do really wish they would just allow running a VM on an iPad though at this point. Running a linux or even MacOS VM would be a nice escape valve for a lot of things that can't be done natively.