There is an app called Duet that, if you have an Apple Pencil, basically turns an iPad into a Cintiq. It seems to work fine, in that it has OK latency and the pencil works. But the bigger issue with using it casually – and I don’t see how an actual Cintiq would be any different – is where do you put the mofo?
If you’re using pshop the way I do, and certainly if you’re using something like zBrush, you need constant access to your keyboard, and (at least until you retrain yourself) your mouse too. That pretty much rules out using the tablet in any natural-feeling position. At the very least you’d need a special stand, and I think that if you want to use something like this seriously, you might just have to get used to your workflow being less comfortable in other ways.
