Go on, do it !!
You're clearly a Windows user, yet you're looking here. I've owned Thinkpads for the last 13 years and wouldn't use another Windows based laptop, however....I just put down for a MPB. I want ease of use, longevity(at least 3 years) for use and something that is not going to crap out on me unexpectedly.
I ran Linux about 3 years ago for a year or so, but found it just needed too much tinkering, otherwise I would have stayed with that.
The Thinkpad tablet is a great bit of hardware, but it runs Windows. The Mac(any Mac) is well designed from a hardware perspective and the software ties in perfectly to that design. Can't wait to get my own in a couple of days.
ps. even though I don't own one yet, I have spent enough time on borrowed machines. cheers.