Hmmm. Most people I know who own iPads have had them end up as rather expensive children's toys.
Or, in my case, a YouTube player comfortable enough to use in bed. I had such plans - a laptop replacement, a smart drawing and writing tablet, a conveniently portable development tool...none of which came to fruition, because the technology wasn't yet there. I'm a little tempted, now, by the iPad Pro and the Pencil. It sure would be more comfortable and convenient to retouch photos that way than with a mouse or a tr…
I haven't really looked yet, but if there's an art class app that guides you through drawing exercises, I think I would take the leap.