Thanks for the links. Of course teaching (and the teacher!) is academic but I admit my post contained some ambiguity...
I'm more interested in academic research applications involving the iPad + pencil: reference management, organization, etc., weaving the device into reading and annotating for the purposes of academic writing (especially whether it is possible and efficient to somehow sync or airdrop annotations, highlights, notes or long "quotes" from a PDF on the iPad you read on to the Mac you write on), and perhaps what some people call the digital humanities.
I'm interested in general experience with academic applications of the device that I haven't considered, too, as I don't yet own an iPad + pencil and am thus likely not as well positioned to think of all of them.
I'm a Professor in the social sciences/humanities, and I use the iPad Pro and Pencil literally every day. I read large numbers of journal articles and books on the iPad and mark them up with the pencil in PDF Expert. I have probably 500 PDF's in iCloud in the PDF Expert folder and at any given time I'm working with 50 or 60 of those (I'm currently finishing a book).
iCloud automatically updates all the PDFs, so as soon as I mark something up on the iPad it's already on my mac (in iCloud drive) so I can look at the PDF on the mac as I write.
I also use Amazon kindle on the iPad and like the pencil for highlighting academic texts.
I use the Notes app for taking notes during talks and seminars. Mainly these are typed notes, but I will occasionally also draw – e.g. to copy down a chart or table that a speaker is using or to incorporate a photo I've taken. These too are automaticaly synced by iCloud to my mac and phone (I sometimes take notes on my phone, a 6S+).
I've used an iPad as a key part of my academic work since it was released, and with the iPad PRO and pencil I'm just more productive.
I also read undergrad and graduate student papers on the iPad and mark them up there.
I did ALL of this just the same before the iPad PRO, but used my finger to mark things up. It's world's better with the Pencil.
I was worried the PRO would be too big, but now I'm not sure. If they release a 9.7" iPad with the Pencil (as expected), I will be torn about going back to the smaller iPad or sticking with the big one. But in either case I can't imagine not using the pencil from here on out (I've considered buying another as a backup, just because they idea of losing the pencil is worrisome; I couldn't work without it now).