I wrote off the mini initially but after having played around with it for a while yesterday I was impressed, my biggest gripe with my iPad 3 is it's heavy and awkward when reading, so I bought a kindle.
The iPad mini just seems more the right size for that without being too small, also it's a LOT lighter which is welcome, but the text isn't as smooth, I think I'll hold off for the retina mini, but if you're coming from an iPad 1/2 the mini is a lot more portable, and the screen size is enough for me needs, web/email/tv shows/games.
Wonder if they'll bring out a retina version.