http://www.pcworld.com/article/259829/apple_earnings_disappo...
> Moreover how big is that market?
They sold 44 million in three quarters, and they have (at least) 73% market share. So, a total of 80 million in 2012. Probably 50% more in 2013.
http://www.pcworld.com/article/259829/apple_earnings_disappo...