How long can Apple hold onto its dominance of the tablet market with the iPad? There no question that the iPad is leaps and bounds ahead of all other tablets, including the latest Android tablets running Honeycomb, in terms of market share, apps, design and overall experience. With the recently released iPad 2 , it is maintaining its lead. But how long can that last? After all, Android caught up in smartphone market share pretty fast. Today, Gartner released some estimates that take a stab at guessing what will happen to tablet market share through 2015. Last year, Apple's iOS held an estimated 84 percent share, compared to 14 percent for Android. The iPad's share of the tablet market is expected to drop to 69 percent this year, 64 percent next year, and keep falling to 47 percent by 2015. It will still have the largest share, but during the same period Android is expected to grow to 39 percent share.