OSX gets an update every two years. iOS gets an update every year. Android gets an update about every six months. MS can't compete if Windows gets an update every three years and WP7 gets an update every year-and-a-half.
What was so innovative about the last two major Android updates? Flash support? NFC support? BFD. Unless the device makers decide to start putting in some newfangled sensor or input device, about the only things to look forward to are performance improvements and better application integration. Even now Android STILL doesn't have a media player worth a plug nickel.