In a mushy love letter from Claptrap, the iconic character from Borderlands, Borderlands 2 promises optimization for the PC version. It took the feedback from the players of Borderlands and decided to implement many features for the PC version of Borderlands 2.
Here is the list of things that Claptrap has promised:
I love the delivery from 2KGames, how they used Claptrap, and how they listened to the players' feedback. This love letter has done nothing but made me even more excited for Borderlands 2. Personally, I didn't think that the controls and UI was that bad in Borderlands, but if they are promising so many things, it's definitely going to be much better.
You can read Claptrap's Love Letter here: http://www.borderlands2.com/loveletter?x