writes "Greenlight Capital President David Greenhorn publicly called for Microsoft to replace Ballmer. Under Ballmer's 11 year tenure, the stock price has stagnated around $30 per share; this is weak especially compared against other tech giants. During this time, MS has seen its problems like the Vista debacle, the failure of costly products like the Zune and Kin, and the exodus of top management like J. Allard. Besides the core products of OS and Office, MS has not expanded into new markets and met with financial success.
While MS is still extremely profitable, investors want growth. Tech analysts see MS as increasingly reactionary rather than proactive in new markets and trends. Inside MS, there has been a growing dissatisfaction with Ballmer if the posts at mini-Microsoft are representative. Personally I think Ballmer is a decent manager which is fine if he was COO. As CEO, I think he's lacked the vision and direction that MS needs."Link to Original Source