Yeah, but i don´t know anyone who works with video or graphic design that enjoys or even wants to work on a laptop, and a 15' one at that.
If your a professional working on the road, it might have it´s uses, otherwise i can´t see a reason to upgrade from the previous line... just for the screen, other specs are nice tho.
Well... as another anecdotal point, I know lots of video editors who use macbooks to do rough cuts on location. (I recall the last interview I read with Steven Soderbergh, who was editing Haywire on his MBP at a hotel bar).
For myself, a good fast laptop with a sharp screen is excellent for showing off your work to clients, and making little tweaks in a meeting, while discussing layouts. Then when you get home there's no copying fresh files over to the desk computer, you just hook up the monitor/usb and keep going.
Seems a lot of people are applying print-level colour calibration issues to everything, but remember that on the web and video, you are dealing with a huge range of calibrations for your output product, which often means sRGB. These IPS screens are more than up to that task.
The thing that actually excites me as much as the retina display on the new models is the two thunderbolt ports. and of course the sexiness.