I've been considering getting an iPad w/ Pencil for over a year now as a note-taking and doodling apparatus (too often I'll scribble a system diagram down, real

I've been considering getting an iPad w/ Pencil for over a year now as a note-taking and doodling apparatus (too often I'll scribble a system diagram down, realise I've missed a bit, and had to start again thanks to the immutability of pen and paper). But beyond that, I don't think I'd have a use for one. All this power sounds great, but I really don't know what else I'd do with it, beyond surfing an ad-riddled internet on my couch. If any developer has a life-changing daily use case for their iPad, I'd love to hear it.