Well, sometimes people do something totally different and it turns out to be revolutionary, sells a lot, is very popular, etc. But we can't forget that more often then that, we can see someone do something different and end up ... bankrupt, dead, irrelevant.
That was Windows Phone 7. They did their bold move. Killed native apps and restarted with a crippled interface without even copy+paste. What happened? Microsoft went from a confortable 3rd place in the market place into absolute irrelevance in less then 1 year =) In their marketing offensive in Dezember 2010 they spent 2 billion dollars no results at all. If they didn't have Windows, Office and XBox as cash cows to be able to absorve losses, if Windows Phone was a single company, it would be bankrupt.
So just like Windows Phone 7 "revolution" was a disaster, other "revolutions" can end up just as bad. And Ubuntu's "revolution" is not going very well. I wonder how well the Windows 8 "revolution" will turn out for them. At least Microsoft has a very confortable position, as they have very strong OEM agreements, most companies are still loyal to them, Linux still truggles in the desktop and Macs are not trying to compete at all in the low end of the market because they demand a premium price. But it would be funny if they achieve the impossible and end up with a strong loss at desktop market share.