It's been a long time coming, but Android tablets finally overtook the iPad in market share in 2013, according to new research from Gartner. More than 121 million Android tablets were sold last year, Gartner reports, giving it 61.9 percent of the market. Meanwhile Apple's iPad sold an estimated 70 million units, enough for 36 percent of the market. Notably, Android's high market share doesn't necessarily translate to high profits for manufacturers. Gartner reports that Android's success in the tablet market came because low-priced tablets put them within reach of more consumers than the iPad, which continues to sell at a premium. The fact that cheap tablets would eventually grab the lion's share of the market was all but certain. More surprising is that it took this long.