Apple sells a lot of iPads - their recent financial disclosing leave no doubt about it. But looming behind the Cupertino giant is the specter of Android, ready to take over the tablet world as it already has the smartphone one. While Apple shipped more than 15 million iPads worldwide in the last three months of 2011, Android tablet shipments rose to 10.5 million, giving the two platforms a 57.6% and 39.1% share of the tablet market, respectively. Compared the the same quarter in 2010, Apple's market share dropped my more than 10 points while Android's rose by almost exactly the same amount. The latest numbers are according to Strategy Analytics.