Although I appreciate any update for Gran Turismo, I must admit that after reading the list of changes I'm kinda disappointing and was expecting more.
Here's my take on the changes...
1. Simplified interior view added to all standard cars.
Expect a darkened black dashboard nearly identical to GT

SP
2. User control of the weather change feature.
Will be nice, I'm interested to see what feature we can adjust.
3. Added a setting sheet feature allowing you to save multiple car settings.
Finally!
4. Spec 2.0 opening movie.
I disable this anyway, don't really care. I'll probably watch it once, then disable it again.
5. Improved UI usability and response.
This will be good.
6. Replay rewind and fast forward.
Never really watched my replay's much, but now I won't have to play it over and over again just to watch a single portion. I know alot of people will love this.
7. Ability to save during a race
Now I can finally complete some of the longer endurance races. Like this alot.
8. Online Lounge Expansion (Ability to narrow down car types via search, shuffle races).
Looking forward to this as well, hoping that there is a way to ban Veyron's, and X1's from rooms.
9. Expansion of the B-Spec remote race you can play from GT.com (a graph display now shows changes in race rankings.).
Never played B-Spec from GT.com, don't really care to.
10. Expanded Photo travel features. You can now take photo’s of cars together with your avatar.
Will be nice for those who love the photo mode feature
11. Added a “NASCAR Pit Scene” stage to Photo Travel
Never played around with Photo Travel that much, don't really care.
12. Added eleven 2011 model NASCAR cars.
This makes me mad, they take one car model and put 11 different skins on it and all of a sudden it's 11 new cars. My prediction is it'll be 11 new Impala nascars with 2011 livery on them. ********.
13. Added the Nissan GT-R N24 Schulze Motorsport.
Another GT-R, really? How many does that make now, like 30 or something? I'm still hoping that we'll see real new cars added sometime soon.
14. Improved physics and AI.
I don't expect that they'll change the physics that drastically, but I'm curious to see how the AI will change.
15. Support for the Logitec G25/G27 Steering wheel.
Finally!
The track pack will be really nice. But I'm not looking forward to seeing how many civics, and GT-R's the race car pack adds. And as for the helmets and race suit pack, who the hell cares about ****ing helments and race suits. This is one of the most retarded feature in Gran Turismo 5. I'm annoyed that they paid developers to model ****in helments and suits instead of cars and tracks.