The tablet market is falling short of forecasts, mostly thanks to smartphones

In 2011, research firm Gartner predicted that 300 million tablets would be sold annually by 2015. But reality is falling short of that forecast: Research firm IDC estimates that 207 million tablets were sold in 2015. Arik Hesseldahl writes that one of the causes is likely smartphones: Screens on smartphones are growing larger, reducing the need for a tablet. But one market in mobile that IDC sees growing is what it calls “detachables,” or tablets that can attach to a keyboard and mimic a computer.