Depends on your needs bro..
Looking back at my undergrad and grad-school years (2007-2012), I would've absolutely loved the Surface RT as my class companion.
For 3 years I used to lug around my 5 lb HP laptop to lectures and tutorials for note-taking, and for study-sessions (reading, procrastinating, etc). The Surface RT would have easily been much more convenient for all of those tasks and a bit more, e.g. during PowerPoint presentations, showing work to profs, etc.
In my 4th year I started carrying a Samsung netbook for note-taking instead, and to be honest that's all it was good for - inputting notes. I had to revert to my HP or a larger screen in order to comfortably read and do meaningful work on. Again, a Surface RT would've been awesome for all that.
For grad school the Surface RT would have absolutely been indispensable, I would not be able to live without I think. Looking back I did a lot of work on Excel, a lot of PowerPoint, and in a lot of cases had to show work to my professors for feedback and the like. And during presentations? It would've been sweet.
That said, while the Surface RT would have been a great companion or supplement to my laptop, it would not replace it. I still used legacy software such as Stata, and that required me to pull my laptop to my profs for help, feedback, etc. Also, for my undergrad, I would've had to use my Surface RT on an unsecure WiFi network (school required plugins and stuff for secure access)... But for grad school, WPA2 all the way baby.