Descriptions of each:
Clock: It looks almost like the interface that appears when using the multimedia station. It shows the time, weather, music, photos, and alarms.
Gallery: It has been completely revamped, I can't even begin to explain how amazing and different it is now. It uses the accelerometer to angle the photos when viewing them and you can now swipe threw photos to view them.
Genie
widget: When used as an app it displays detailed weather information, top news stories, and you can even add
custom news feeds! When used as a widgit it looks like the native widgits that come preinstalled on the Droid such as the power manager, it can be set to display weather info, news, or both.
Launcher: You are given 5 home screens instead of 3, the apps drawer opens with a nice animation and the apps scroll over the edges of a box
Music: Now has tabs at the top showing artist, albums, songs, and playlist. When viewing an album the artwork is shown in the background of its songs list.