Part of what makes Android brilliant is the vast amount of customization available to the average user. Beyond the default widgets and applications available already on a mobile, and then available to download from the Play Store, there is huge community who are always making new things to spice up your Android’s homescreen.
An excellent example is these Flat icons created by ‘Mitch S‘. The icons have a very minimal feel, and are sure to look great on Ice Cream Sandwich.
If you are fluent with Android, then this should be easy for you. Just download the ZIP file and transfer it to your phone, and then use an application to change them from the default icons to the flat ones.