I noticed the Nexus 7 home screen uses a "smartphone style" layout, with the favorites tray at the bottom of the screen, the All Apps button located in the center of the tray, and the Back/Home/Multitask soft buttons centered.

As far as I remember, previous Android tablets after Honeycomb used a dedicated "tablet style" layout, with no favorites tray, the All Apps button located in the top right of the screen, and the soft keys left-aligned.

Why isn't the Nexus 7 using this? Is it because the 7-inch screen was deemed too small for the tablet style layout? Or has the tablet style layout been deprecated entirely from Jelly Bean?