Seven-inch tablets like Amazon's Kindle Fire HD and Google's Nexus 7 are expected to see significant sales increases this year, taking almost a third of the overall tablet market. This according to IHS iSuppli, which announced its estimates for the 2012 tablet market today. Apple's iPad is still expected to dominate the market on the whole, but iSuppli's estimates indicate that the Cupertino company is likely to face mounting competition as the sector expands.
