Android Gingerbread will be the most jarring upgrade the OS has seen yet. The interface will see a major upgrade, as will Android gaming. Gingerbread is expected to be Android 2.3, which may see a launch by Q4 of 2010.
This is confirmation that Gingerbread will be 2.3, and the first rumor we've heard that the Nexus One will be Gingerbread's inaugural device. The Nexus Two was originally expected to be the first native 2.3 smartphone. Now that it has (apparently) been delayed, Google may be using the Nexus One to reveal Gingerbread to the world.
So what of the Nexus Two? If it doesn't launch until January, Google may try pushing it to launch along with the release of whatever version of Android (3.0?) comes next. If that's the case, bleeding-edge developers will have to make due with their Nexus One for a little longer. Hey, at least it's aging well.