Balmer has a record of presiding over massive disasters. Blind Freddie could have doubled Microsoft's profit given the start Balmer had, and left the company in a strong position instead of facing oblivion within the decade, which is what we see now. Balmer learned nothing from the Vista debacle, and was in the hot seat while Microsoft lost the plot on Office, completely borked a major Windows release, bet the company on transitioning the whole thing to phones and tablets, and lost. Right now, Microsoft has a half-credible product in phone space but no sales, no credible product in tablet space and no sales either, and and relies on the obsolete Windows 7 to retain desktop mindshare and corporate sales.
Out he goes. Massive fail.