Product development, especially in brand-new markets, requires a visionary with excellent taste, and the trust and respect of his team to revise with confidence.

I can imagine what happened with Zune, cloud, etc is that (an enormously successful) MS assigned senior engineers to head up potentially prestigious new projects as professional rewards, but what they should have done was acquire-hire startup founders with fire in their belly (and strong vision) about the space. Ironically anyone with that much belly fire probably would have left MS to pursue it, basically disqualifying everyone left. :)