Interesting read ..
"Steve Ballmer had a dilemma. He had two groups at Microsoft pursuing competing visions for tablet computers.
One group, led by Xbox godfather J Allard, was pushing for a sleek, two-screen tablet called the Courier that users controlled with their finger or a pen. But it had a problem: It was running a modified version of Windows.
That ran headlong into the vision of tablet computing laid out by Steven Sinofsky ...."