Honeycomb utilizes a nice feature which Google calls “fragments.” What this means is an app can have more than one fragment (or panel) open at one time. Fragments are a great way to handle a lot of content in an organized manner and allow the user to more easily navigate.
Google recently showed off how fragments can be used at their recent Android Event. During this demonstration the CNN folks showed how
CNN’s News application in landscape mode can show all the navigation in the left fragment (panel) while content is displayed on the right. Google also showed how fragments would work with Gmail, and Google Talk. As you can see from the images the fragments to the far left are "anchored" while the content on the right is dynamic.
Fragments will be a great way to display content, and allow easier navigation of tablet devices such as the Xoom. It will be interesting to see how other developers utilize fragments.