Android 4.1 a.k.a Jelly Bean....

Is it just another update to Android or is it a milestone in Android evolution.

To me apart from all the incremental improvements to the various systems in Android, Google Now seems to be the only ground breaking new feature in it. More over I have heard many reviewers rave about the speed improvements in Jelly Bean.

So should we wait for Android 5.0 to upgrade our phones/tablets or is Jelly Bean a reason enough? Whats your opinion?