I'm not sure they've learned anything meaningful, unfortunately. But from their own statements I think we can assume a few things: Wii U was a dumb and confusing name, and that their advertising was unsuccessful to convey that they had a NEW console out. They might also realise that they can't support two consoles at the same time alone, they will therefore unify their new HW with a unified OS. Whether or not this means shared games or not remain to be seen, but porting will most likely much easier. This might also mean that they understand that they need good 3rd party support.
I don't think we can expect much more than this from Nintendo. This is all based on statements coming from Iwata and Reggie.
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Furthermore, I think VGChartz should add a "Like"-button.
