Recent quotes:

Ballmer has shown himself unable to get on the right side of this power curve for years. He scoffed at the iPhone when it was first introduced, saying it was too expensive, and would only be a niche player. The Zune was another example of too little too late. And now we are seeing the same slow-and-tight response to tablets.
Microsoft sees worst stock drop since 2000: welcome to the Post-PC era
Office 365 is the fastest growing product at Microsoft
Some people think social is one product. I don’t. Social is a way of working.