I had a tablet PC, convertable kind, Toshiba.
I was a 'freak' for having such a device, but doing an engineering degree, it was perfect. Equation I scribble down to LATEX yes!
One note is still my favourite note taking program, frankly puts evernote to shame.
I noticed I was the only one in a class of about 200 with one. 3 years later that had changed to eight, based on people asking me.
These things were expensive, I was lucky enough to get some grants for being dyslexic.
I honestly think they are great devices, battery life is now adequate, ultimately a Pro would be my go to university machine, enough power for any engineer that didn't require a rack. Great note taking.
However the price is objectionable. Most uni students I know would waste money on an iPad. Most people who buy iPads don't want a real computer, and RT offers little in apps they use. Outlook?! Why do they want that for their simple emails, its too complex.
I'd be pretty happy with a digitizer, I think, but I wouldn't be able to stand all of the other little quirks of the surface.
I only did that for a year or two before I decided that laptops and note-taking in general were counterproductive and switched to never taking notes at all. I still occasionally took notes on my own time while reading the course material, but I found that paying closer attention instead of trying to write things down ultimately worked better.
(Apple has a very long history in the education space, and now that is paired up with some truly exceptional products. It's a potent mix, at least in theory. In practice, well, you get the LA school district iPad catastrophe...)