Photographers should be aware of how the Macbook Pro Retina display behaves with Adobe Photoshop and Lightroom, which have yet to be upgraded by Adobe to support the MacBook Pro Retina display.
Similar challenges apply to most other photographic applications.
That said, Photoshop and Lightroom badly need upgrades to properly support the Retina display. My word from Adobe is that it is in progress with no announced release date. Presumably this is the “hammer” from heaven (from Adobe’s point of view) to get reluctant CS5 users running CS6.