If you music, have an iPad, and can spare the cost of a couple restaurant dinners, I recommend picking up the USB adapter and an app like AUM ($22). There are a ton of workhorse tools available like BIAS FX 2, and a ton of apps which are just fun, like Gauss Field Looper ($7). The price/performance of this kind of setup is just out of this world. I don’t think it’s replacing the DAW any time soon, despite the arrival of Logic/Cubasis/Reason/etc, but it’s giving pedalboards a run for their money.
However, as a musician, I wouldn't perform with one, but I use forescore literally every day.
As an sound tech, I've mixed a while lot of shows on glass both as a monitor engineer and FOH for smaller stuff. My iPad is a great tool for that work. They are pretty ubiquitous amound sound techs, at least at the levels I work at.
The limiting factor is the performance software (Mainstage and Live) aren't on iPadOS, yet. Live has some bigger lifting to do to get there.
It feels like even if Apple's DAW utopia came to pass, the iPad would still be an imperfect and less powerful option compared to a similarly specced Mac.