Of course you can't fathom where Nintendo will take gaming next; that would mean they were being predictable. And quite frankly, no industry ever gets better when it's predictable. As Iwata put it, "we can't ask our customers 'what will surprise you?', because they don't know either." Upgrading online capabilities and storage capacity is a predictable upgrade.
Transitioning from controller-based gameplay to non-controller-based gameplay is not so much so. Finding a way to make games entirely playable without any need to hold something in your hands sounds downright ludicrous to an established gamer, but would certainly accomplish the task of surprising people were it done correctly. That's only one example of where Nintendo could go from here. There's many other routes that nobody outside of Nintendo has thought of yet, too.
Sky Render - Sanity is for the weak.
