The iPad Still Dominates Tablet Usage
Data recently published by online ad network Chitika nicely illustrates how big Apple's lead in the tablet market still is. Chitika tracks tablet usage based on tablet-based impressions in its ad network and no competing brand even comes close to Apple in that regard. In April 2014, iPads accounted for 77% of tablet-based web usage in North America, dwarfing the share of Samsung and Amazon at 8% and 6% respectively.

Description
This chart shows the Top 8 tablet brands in North America, based on their share of tablet-based web usage in April 2014.