IMHO, this really *shouldn't* sound exciting. It's a case of Apple refreshing the product to keep it "current" and in-line with their competitors. This isn't a big redesign or product change.
On the other hand, that's not saying it's not a very GOOD update. I still have the original Macbook Pro model (2.0Ghz Core Duo 15") and I'm just starting to consider reselling it and getting something newer. (Mostly because after using my friend's newer Core 2 Duo 15" model with the LED backlit screen, I found the battery life is much improved AND it seems noticeably faster running applications.)
A long time ago, I had the 17" Powerbook G4, and I'm still tossing around the idea of making my next MB Pro a 17" model.... They're not too usable on airline flights (at least in coach seating!), but I probably only fly once every 2-3 years on average. I usually just use my portable in situations where I have some kind of table or desk I can set it up on, and the bigger screen with better display resolution is really useful.
As soon as LED backlit displays were announced though, I decided I'd hold off until the 17" model got one. That adds a good hour to your battery life.