I edit 4k video on my iPad, edit pictures, memes, do a bit of drawing with Procreate. I'm by no means professional at any of these things, but it isn't the tools holding me back.
I don't see any reason not to use Excel or Numbers or what have you on an iPad with the keyboard. I'm sure it would work fine.
I know a couple professional music producers who do the bulk of their work on a tablet now.
What hasn't made it to tablets is coding environments. Codea and Swift Playgrounds feel like toys to me.
But it's only a matter of time. I think "decades, if it ever happens" is entirely too pessimistic, it's more "now, if you want it", for most of those things.
And it's definitely not "literally no one". It's more people than you think.
