Wow an overwhelming response in favour of the Hi Res screen. I'm about to pull the trigger on a MBP and went to the Apple Store yesterday to check out the high res screen, but they only had it available for the 17inch model. It did look a lot sharper, and I think it's something I want.
When I was talking to the Apple guy there, he said it won't make a difference for me and is mainly for graphic design and things like that. But someone posted above about the hi res screen giving them the ability to put two documents side by side, which I think would be useful too!
Decisions, decisions...(probs go hi res though)...
I spent forever looking at them. I'm just retired so no work applications for hi res. When I had the sun shinning in the window behind me in the kitchen and I could still see my screen clearly I knew I had made the right decision. It is just a super screen IMO.