I was pretty much dead on the money with the expectations in my post.
Like anticipated Pikmin U uses the sub screen for an overhead view, not very interesting, but it retains WiiRemote functionality which is good in my point of view. No specs what so ever (obvious). And confirmation for 2 Upads in the future.
Is really weird... not a single application of the sub screen surprised, much of those uses i thought about even before the WiiU was officially unveiled. 3rd party support is really concerning, mostly ports with frivolous uses of the touch screen and not increased graphic fidelity. Everyone interested in those game have played them already.