Honeycomb is the upcoming version of android from Google. Honeycomb was built from ground up and is fully optimized for tablet experience. Honeycomb is for devices with large screens and addresses unique aspects of tablets. This is what Google has to say about Honeycomb.
"Honeycomb is the next version of the Android platform, designed from the ground up for devices with larger screen sizes, particularly tablets. We’ve spent a lot of time refining the user experience in Honeycomb, and we’ve developed a brand new, truly virtual and holographic user interface. Many of Android’s existing features will really shine on Honeycomb: refined multi-tasking, elegant notifications, access to over 100,000 apps on Android Market, home screen customization with a new 3D experience and redesigned widgets that are richer and more interactive. We’ve also made some powerful upgrades to the web browser, including tabbed browsing, form auto-fill, syncing with your Google Chrome bookmarks, and incognito mode for private browsing."
There's has been some videos released during the ongoing CES 2011. Check out how honeycomb interfaces are customized for tablets.
Android Honeycomb Introduction Video
Honeycomb Desktop Overview