From the current sales situation, about 4 million iPads can be sold worldwide in a quarter, which is close to 1/10 of the global sales of laptops in the same period. American analysts estimate that iPad has made billions of dollars for Apple since the listing. And due to the shrinking market share of Windows devices, Microsoft lost $ 50 billion in market value. What is more frightening is that the days of the iPad alone are going to end. Almost all IT giants such as Google, Samsung, BlackBerry and Microsoft are lined up Ready to launch tablet. The main meaning of this text is:. ['iPad has become an important source of profit for Apple.', 'Global laptop sales are still higher than iPads.', 'Tablets will pose a major threat to laptops.', 'Behind sales reflects fierce competition between technologies.']