According to the market research firm Gartner, Worldwide tablet market has been estimated to sellout a total 118.9 million units in 2012, with the Mac makers dominating the sales and Android still trying to replicate its success in the Smartphone market.
http://www.notebookcheck.net/Android-sales-won-t-bother-Apple-s-atleast-in-2012-says-Gartner.73118.0.html