GPU Acceleration: A Killer Reason to Upgrade to CS4

Upgrading versions of Photoshop isn't cheap and some people may be wondering whether skipping a release might be a good way to save money. If you've been trying to decide whether to spring for the CS4 upgrade I'd advise you to carefully review the new features on Adobe's website. But one new feature that is hard to fully appreciate without seeing it in action is the use GPU and OpenGL acceleration to speed up screen redraws....
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