Android-4.0 code-named Ice cream sandwich the next version of android os was scheduled to be announced in samsung’s ‘unpacked’ event where samsung will launch its new phone Nexus Prime which will be the first phone to get icecream sandwich operating system.
The screenshots of icecream sandwich already surfaced the internet, even before this official launch.
The look and feel of the UI is a combination of gingerbread and honeycomb OS.The button less screens will have the navigation icons at the bottom.There are also widget screens similar to those in honeycomb.
See below the screenshots of Icecream sandwich.
The below video may explain you more about the UI.
It seems the google+ app for android will get an upgrade to 2.0 along with ICS announcement.