This all said - we have just got a new suite of MS laptops at work. Brand new high spec ones, with MS Office 2013. Office 2013 is just awful. Certainly, Microsoft remains a behemoth, but it's hard to escape how dreadful some of their major software has become, and that it's being recognised as such by people who previously didn't want to/couldn't think such things. Windows 8 is widely recognised as an update to be avoided and if it came with your new machine, something to show your friends and laugh at.
Microsoft's marketing and influence has been so pervasive that people who pointed out the company's failings in the past were aggressively shouted down (as we've seen in this thread). Whether this is a "Tyranny of the Majority" effect (read John Stuart Mill's excellent essay) or just people (consumers, businesses, governments) incapable of admitting that all the money they've given Microsoft might not actually have got them the best that money can buy, I don't know. But what we're seeing, I believe, is a shift from this for the first time. Microsoft is still massive, with a hugely dominant existing user base, but people's opinions are changing and they're going to have to work a lot harder to make this up.