Chatbox, you're asking the wrong question. What other people use it for is irrelevant. The question is, what do you use a mobile computer for? What do you want to do?

Myself, I use my n810 for reading ebooks (FBreader), surfing the net (MicroB), listening to podcasts (Canola), games (VGBA, Nethack, others), and as a PIM (GPE). I seldom use it for email or IM, and almost never for videos. I'd be reasonably happy with it as my only computing device for a few months. But that hardly means it would suit you best.

Make a list of everything you'd want a computer for on your cycling tour. Figure out which device is better at each task. Figure out how much the size, weight, and charge options are worth to you. Which works better for you overall? Take that one.