Apple still held on to a commanding lead in tablets in the winter, Canalys said Thursday. Escalating competition from the Samsung Galaxy Tab didn't stop the iPad and iPad 2 from getting a combined 74 percent share, making up 4.69 million of the 6.4 million tablets that shipped between January and March. The slates would have claimed more but had been hit both by the post-holiday lull and the shortages surrounding the iPad 2, according to the researchers.
