I should also put a shout out to the compatibility library and google play services - these mean app developers are not tied to having to code against the lates

I should also put a shout out to the compatibility library and google play services - these mean app developers are not tied to having to code against the latest version of android to use new features. Essentially all Android updates do now is to change some of the core OS plumbing. The big changes from 4.1 to 4.2 were rendering speedups. 4.3 seems to be new versions of the bluetooth stack and open GL.