Author: Thom Holwerda
Source
Basically, this seems to mean applications will no longer be allowed to limit themselves to phone size when running on devices with larger screens, like tablets. Other tidbits in this first beta include predictive back support for 3-button navigation, support for the Advanced Professional Video codec from Samsung, among other things. It’s still quite early in the release process, so more is sure to come, and some things might not make it to the final release at all.