Just a small point
Everyone is so excited about the Surface Pro, which I am sure is great, but did you know that there have been Windows 7 tablets about for a couple of years, which will run Windows 8 quite happily and have basically the same functionality as the Surface Pro? The Surface Pro is merely an evolution of these with hopefully better battery life and generally 'nicer' design, but if you want to try a Pro tablet out on a budget, consider one of these.
I've been using one for almost a year, but when it comes to 'proper' work, even serious online shopping, I still want that big screen, keyboard and mouse experience, even if that means simply plugging in an HDMI monitor and a keyboard/mouse USB dongle. For casual browsing, emails and touch games, and of course, portability the tablet is great. I don't expect this view to change with the Surface Pro launch.