"Microsoft's execution in mobile has been excellent". This could not be farther from reality. Microsoft has consistently lost money in the mobile market, to a point they are ashamed of it, and don't even give sale figures for the Windows Phone OS anymore. Profits from this business unit is reported in the "Entertainment and Devices" unit, which has turned a loss this quarter, again, of $229M. The only argument the au…
Windows Phone 7 is a field test of the technologies which allow Windows on ARM to scale. Five years after the iPhone Microsoft has a competitive OS that scales and is robust enough for their enterprise customers.
Balmer understands that Microsoft's success in the consumer market segment comes from treating those relationships as B2B by providing long term support - my 8 year old laptop still gets OS updates - they sell on improvements not by breaking systems into obsolescence.