This little computer is cheap. Really cheap. For $30, you can have a personal computer, provided you have a television. It's really great as a child's first computer, or as second computer, or even a little file server. But while it can be used for those traditional, almost boring things, there's something better.
Again, it's cheap. So cheap you could probably afford to put one of theses almost anywhere. I have two Pi's of my own. The first one I bought turned my normal TV, into an internet enabled entertainment center. By using the Raspbmc image, I have a TV that I can stream YouTube, music, movies and even pictures from my computer, phone, or iPod. I want to use my second one to run my smart dorm when I go back to school next semester. Any place you have ever thought, "Gee, if only there was a computer here", with the RaspberryPi you can actually make it happen. There is almost no limit to what the RaspberryPi can do.