It's not just about scalable UI. The Android concept is of fragments. Quoting from the allthingsd interview of Rubin - "[Fragments] allow apps to split their f

It's not just about scalable UI. The Android concept is of fragments. Quoting from the allthingsd interview of Rubin - "[Fragments] allow apps to split their functionality on varying devices. In other words, the Gmail app on an Android phone will load your inbox on one page, then slide to a new screen to display an email. On an Android tablet, that very same app will display completely differently, loading the inbox in a left-hand pane and using most of the screen real estate for emails. Rubin stressed that Android engineers have thought hard about making sure apps are backwards compatible with phones but still run well on tablets. Rubin started to talk about how fragments will work on Google TV before switching topics--we’re guessing he was simply going to specify that some apps will fragment to take advantage of the TV platform as well."