I had the same thought process awhile back before I took a much needed break from school. At the time (10moths-ish ago) I had a Dual G5 1.8 and a iBook G3/900 that filled the bulk of my school needs. I also had a DA Dual/533 that was a dream of a server for all things media in the house. But as demands stepped up for studies, I figured I needed to step into the intel world.
I sold the lot, and got a decked i7 2011 mini and an Acer iconia A500 tablet to get my linux fix. It worked out pretty well for awhile. The mini does damn near everything I throw at it and them some. While the Acer tab is really a nice machine to use. Airplay worked reasonably well, with a 24 and 22 lcd's hooked up to the mini I did not have much need for it.
Dropbox came in handy as well as logmein as others have said. But there were a few killers in the equation:
1. Single application at a time. The androids tabs have the same issue as any other. While you can have many "active" app's running you have to physically switch between them. Which for me was bothersome to say the least.
2. I purchased a very nice bluetooth keyboard/case combo for my a500, for light things: email, browsing etc. It was and still is great, but abhorrent to say the least when it came to classes that demanded a lot of lecture notes. To get around that, I did try a few app's that amplified the internal mike for audio recording to maybe play them back and transpose them later on my mini no matter what I did, I could not filter ambient noise enough to make it worth while.
So flash forward to a few months back. Strapped for cash and with a setup that worked for the most part, I found my solution. This PB 1.5/15 that I am typing on now. It was dirt cheap. A rock solid machine, with an amazing keyboard, battery life, screen and build quality. It does everything I demand of it daily and never skips a beat! Not bad for a $50.00 find on Criag's list.
I still have my tablet, and it is great for content consumption. It is waiting for me in the morning to browse the news over my morning tea, it streams netflix and hulu while I make dinner and what not. I do not regret the purchase, however, if I had really looked at what I needed everything to do for me in my daily tasks? I would have also gone with a mini/air setup.
Sorry for the long-winded post! Just my experience in it all.