Wouldn't creative professionals, at least those working in design and video, be pleased with the Retina display? Where else are they going to find a display of this caliber to work with?
Yes, but it's on a 15" screen. I haven't had a 15" screen on my desktop since 1994. Resolution is important, but for many tasks, so is size. The new MBP has a 2880x1800 screen, the old Apple 20" display had a 2560x1600 screen. So, while the MBP has a few more pixels, it's not that many more pixels.
Having seen neither, I can's speak to quality issues on the two screens.