What's different on Jellybean

[tilk23]

I got my Jellybean update and I'm wondering what differences people spotted that I'm not aware of . Please share.

 

[Digital Controller]

The JB update was mostly bug fixes and performance updates. The biggest change was the introduction of Project Butter, which just makes the experience of android a lot smoother...

Otherwise other additions, the biggest being Google Now.

 

[Theonesalmon]

Is there any way to make the double tap of the home button load up Google now instead of svoice?

 

[Pappy35]

How about updates to the GMail app? Does it now auto-resize so we don't have to pan around to see the content?