rMBP Non-Native Resolution

I have been reading mixed opinions throughout the forum on this subject -- how well does the Retina screen scale when running games at 1440x900? Some people say it's blurry, others say it looks just like it would on a native 15" screen. I know it isn't as bad as a normal monitor would be on a non-native resolution -- and 1440x900 should scale well considering it's half of 2880x1800. I would love to input an opinion of my own on this subject, but the laptop isn't slated to ship for me until the end of July