According to Apple CEO Tim Cook, it’s really only a matter of time before the tablet market is bigger than the PC market.  This is not too hard to believe actually since Apple sold 15.4 million iPads in Q1, and the Kindle Fire (the #2 tablet and #1 Android tablet), sold nearly 6 million tablets in Q4 2011.  Are tablet’s outselling PC’s right now?  No.  But according to Engadget:

Mr. Cook refused to speculate, but he was confident that the tablet market will be bigger, at least in terms of units sold, than traditional computers. Cook is already seeing a shift, with the iPad cannibalizing some Mac sales, but he does believe “there’s more cannibalization of Windows PCs by the iPad.”