Well, I am going to have two get of those hooked up to a new G5!
But first I have to get the money!
Seriously though we use 23inch Cinema displays and they kick ass. They are so comfortable to be in front of for long periods of time. Especialy for people like me who might work 20 hours a day on your computer:( And of course the high res is perfect for video editing, computer animation graphic design, etc. and the new 30inch should only make eerything that much cooler. I think it is a great idea.
But, I think the main reason for doing this is to sell more of the 23 HD displays.