Project Butter is what JB is really all about.

GB and ICS were good, but with JB and PB Google finally got down to working on the one thing Android lacked when compared to iOS: a smooth OS.

There are various other updates to the OS that might not be as transparent as the look and feel of JB.

JB, IMO is a huge upgrade even from ICS. I say go for it!

Tap'd from my 747 roc'n AOKP M1!!