Remember Tap Tap Revenge? Apple included it in its April 2010 presentation on "iPhone OS 4" to show how seamlessly the iPhone could switch between a resource-intensive game and other apps. Two months later, Disney bought its developer, Tapulous.
Apple featured Chair's Infinity Blade (then known as "Project Sword") at its iPod event in 2010. The best-looking game for the iPhone or iPad at the time, Apple used it to show off the strength of the iPhone 4 and original iPad in its keynote and ads. When it hit the App Store, Infinity Blade made a whopping $1.6 million in its first four days.
Apple used its sequel to show the jump in performance between the iPhone 4 and 4S at the 4S's unveiling in October 2011. That December, Infinity Blade 2 netted $5 million in sales, making the franchise as a whole worth $30 million for Chair Entertainment.
Apple briefly demonstrated Autodesk's Sketchbook Ink during the announcement of the first Retina iPad in March of 2012.
The brief appearance caused an explosion in search traffic for the app.
CSR Racing was shown during the WWDC 2012 keynote in order to show off cross-platform gameplay between Mac OS X and iOS.
As with Sketchbook, there was a huge surge in traffic to the app.
Real Racing 3 was shown during the iPhone 5 launch event to demonstrate the power of the device's A6 chipset. The first free title in the series, it dominated the free app charts when it finally hit the App Store.
Remember Anki, the robotic toy car company that presented at this year's WWDC?
They put those cars on sale on October 23rd. As of this writing, they're still on backorder on the company's site.
Get a look at what Apple's releasing next...
