Sony kicked off its gamescom press conference with a live stream where a release date was announced for PS4 as well as price drops for Vita and the 12GB PS3 Super Slim.The firm announced last week it was set to reveal unannounced games as well as its release plans for PlayStation 4 and it did not disappoint. Along with various games and bundles, Jim Ryan announced a PS3 exclusive GTA 5 bundle where is you pre-order the game you will get 75% off all Rockstar titles through PSN. While that was nice to hear, there’s more as you will see below. Dynamic User InterfaceThe stream started off with Shuhei Yoshida silhouetted in a chair on stage messing around with the PlayStation 4’s UI before playing a bit of Killzone: Shadowfall. He jumped into the game while watching a stream, and uploaded a screenshot from the game to the menu and posting it to Twitter. It was the global unveiling of the the system’s Dynamic User Interface. Gran Turismo 6 out in December for PS3After the demonstration, Sony Computer Entertainment Europe president and CEO Jim Ryan took the stage to introduce a new trailer for Gran Turismo 6. The game will…