Ice Cream Sandwich is the name of the next Android operating system that will run on smartphones and tablets. Currently, I'm running Android 2.3 which is also known as Gingerbread. Android 3.0 is called Honeycomb and it's optimized for large screen devices like tablets.
Android 4.0 is called Ice Cream Sandwich and adds easy multitasking, rich notifications, customizable home screens, resizable widgets, and deep interactivity. It will be optimized for small and large screens.
Some Android devices may skip version 3.0 and may have upgrades straight to 4.0. So, the next time you hear people referring to "Ice Cream Sandwich" in the wintertime, don't automatically assume they're just craving a cold sweet treat.