Xpeia Z Ultra Small Apps
I know this is not the ZU forum, but I've just bought the device - wow, the screen is mind blowing.
Anyway, say on the Sony site that one of the screenshots had the screen with multiple small apps open so thought I'd give it a try and hey presto.
The ZU can have more than 1 small app running at the same time, as well as the app that you're in! How awesome is that! Wonder if they will bring it over the Xperia Tablet Z. I can get more than 6 small apps on at once.