Keynote split screen?

[Animeonmymind]

Hey,

After watching WWDC and finally getting a mac myself I was wondering how they make the 3D look with the split screens? The one where, on the big screen, there is a photo of an iPhone and on the other side an image of the presentator. Is this a feature of keynote?

I've included an image to make it more clear.

Thanks in advance!

Edit: *typo*

 

[Matthew Yohe]

This isn't Keynote, this is live video editing video of Phil and what's being projected.