I have a feeling the surface will follow the path of the "kin" and the "Zune". Microsoft has a habit of introducing ill researched products into the market and killing them off. They will leave the tablet marketplace in a few years. As someone else posted, you can get a MacBook Air for the price, which can do so much more. It also doesn't help that the metro interface isn't all that great to use. And the classic Microsoft desktop doesn't suit a tablet.
That's why back in 2007 I took a leap of faith and got my first Mac, and in 2010 got an iPad 1 under the condition that I would return it if I didn't like it. So far, I have no regrets.
Back in 2009-2010 there were so many promising tablets being developed that never saw the light of day just because the first iPad was launched as the only strong tablet solution, causing a lot of these other products to be redesigned or discontinued.
I really though the Surface was going to cause an great impact in the tablet market, considering that it runs Windows. I think a lot of people got very disappointed and upset over Metro UI that somehow it got linked to the failed Windows Vista and Zune Player. Actually, it was Vista what gave me that last kick I needed to jump into a Mac.
Let's see what Windows 8.1 brings. If it becomes desktop oriented as before it's not going to benefit the Surface. Microsoft would need to come up with something people would easily understand and feel motivated to use.