Apple iPhone 4 starting at $199 on June 24, gyroscope added

Apple CEO Steve Jobs just officially debuted the iPhone 4 at WWDC 2010 in San Francisco. While anyone with internet access has probably already seen the thing, we now know some of the new specs -- plus a date and pricing. June 24 for the iPhone 4 in white or black, 16GB for $199 and 32GB for $299, with a contract, of course. AT&T is extending the special pricing to any subscriber whose contract is up in 2010. Pre-orders for the iPhone 4 will open June 15.

The first major gaming-related feature revealed today: what Apple is calling a "Retina Display." No, it doesn't scan your retina -- it's Apple's jargon for the iPhone 4's screen having four times the pixel density as the iPhone 3GS, or 326 pixels-per-inch. That's also 78 percent of the pixel resolution of the iPad's display. Jobs said that existing apps and games will instantly look better, but can be optimized for the screen.