One feature that we all have come to love on iOS devices is the ability to take screenshots natively, without having to jailbreak, or install any third party app.
On the other hand on Android phones, taking screenshots has always been a pain. It requires you to root your device, and then get this functionality either via custom ROM, or by using a third-party app.
But now, starting from Android 2.3.3, you are no longer required to root your device just to get the screenshots functionality. The wait is now for the third party apps to use the new APIs present in Android 2.3.3 Gingerbread SDK to take advantage of this new functionality.