I just recently enabled the new User Interface of Salesforce.com and found it to be really interesting...

Here is how you can enable it in your sandbox

• Login to your sandbox. Navigate to Setup -> App Setup -> User Interface . You can then enable the option as shown in the picture below.

The new theme is supported only in the latest version of  browsers like Firefox, Safari and Internet Explorer . You will get a popup window displaying this message.

Now click on any tab to see the new User Interface.

Setup ,however has the old theme. Below are some screen shots to make you go crazy!!



Here is a look of a Visualforce Page


And Report looks like this



I think most of you would like this... Doesn't it look cool??