Global market share and shipments of tablet anxious?

IDC announced a market forecasts that the tablet PCs would increase average 11% during 2013-2016. The shipments will reach 350million at least by the end of 2017
One in two of the tablets were shipped the small screen size of 8 inches or less in the quarter. IDC is also expected that they will increase in the future. Market share of OS is predicted that Andoroid reach 48.8% in 2013 higher than the 41.5% in the year 2012, Apples’ iOS will be expected to fell to 46% from 51%.In 2017, Windows is predicted to increase. iOS further reduced to 44%. Near the future, web design will be required to consider the feature of Android and small tablet.
http://www.idc.com/getdoc.jsp?containerId=prUS24002213#.UUJT_BySKzE