Since its launch, the Surface tablet from Microsoft has reached 400,000 sales, which isn't a bad start for a tablet that is definitely on the pricey side with an $899 price tag. What's even more impressive is that this tablet only launched a month ago. According to IDC Analyst Bob O'Donnell, "That's a respectable number and it leads me to believe that Surface Pro will end up outselling Surface RT." O'Donnell is, of course, referring to the RT version of the Surface tablet, which is slightly less expensive at $499, though isn't compatible with older Windows software. "It's something that we've predicated all along because of the compatibility that Surface Pro offers," O'Donnell added. Overall, Microsoft has sold nearly 1.5 million Surface devices, including both Pro and RT versions, and was announced only three months ago. Even though the RT version sold out initially, Microsoft was surprisingly able to keep up with demand quickly.