As I said, switcher / dashboard and launcher I can understand that they need to support portrait for this exact case, but home is still something I don't fully get why to do that. The 5th home is a bad idea in the sense that then users would complain that why cannot the usual widgets be accessd from there. And full rotation means that the background images won't really work too well for non-abstract images if they get rotated, and if they dont get rotated, but instead supporting 3200x800 images, well that would not work either too well for obvious reasons.