Let’s start with the obvious: Apple virtually created the tablet market (those tablet/laptop hybrids that sold by the hundreds don’t count). And while it’s losing share as more competitors pile on, the iPad remains the dominant tablet device for both consumers and businesses, holding around 50% of the market.
Apple also continues to offer a premium user experience with tight OS integration, beautifully machined glass and aluminum cases and Retina quality display. Plus, it now offers the smaller iPad Mini and the previous iPad 2 for more price- or size-sensitive customers.
Add in the iTunes store and the largest app store (including 250,000 titles that are iPad optimized) and Apple will continue to lead the pack for the foreseeable future.