Intel is showing off a mobile Haswell prototype (reference board currently in a desktop form factor) at CES and decided to test its integrated GPU (GT3 in this case).
They claim its performance is on par with an NVIDIA GT 650M an ran a comparison demo to prove it. Both systems are running Dirt 3 at 1080p with those graphics settings:
The Haswell computer is on the left, GT 650M computer on the right.
Here's the video in which you can see both in action:
http://www.youtube.com/watch?v=VPrAKm7WtRk
Both look pretty fluid.
Thought this may be of interest for anyone waiting for Haswell to buy a 13" rMBP.
They claim its performance is on par with an NVIDIA GT 650M an ran a comparison demo to prove it. Both systems are running Dirt 3 at 1080p with those graphics settings:

The Haswell computer is on the left, GT 650M computer on the right.
Here's the video in which you can see both in action:
http://www.youtube.com/watch?v=VPrAKm7WtRk
Both look pretty fluid.
Thought this may be of interest for anyone waiting for Haswell to buy a 13" rMBP.