On tablet in portrait mode it should be awesome to have a tab bar at the bottom and a 1/3 pane left with a list container and at the right side of this pane a 2/3 pane with the detail view of the selection of the list item from the 1/3 part. On tablet in landscape mode, the tab bar should be better aligned at the left of the screen, and still having the 1/3 + 2/3 screen pane ratio.

Actually, to be more clear it is a master(list) + detail layout.