This is obviously less than what Microsoft planning with the Surface RT, which had an initial shipment volume of four million units.

FORBES: Links 10 Feb: Microsoft's Surface Pro Sells Out: But How Many Did They Release?

That is consistent with previous statements from the company indicating that the Windows RT version of Surface, which will use an ARM-based processor, will launch in tandem with Windows 8.

FORBES: Connect

Running Windows is all well and good, but when you're running the RT flavor, which strips compatibility with the entire, massive and still-swelling catalog of Windows applications, you're left with a desktop-class operating system completely bereft of any desktop apps.

ENGADGET