The "Disruptive enough" comment is interesting.
Hardware innovations are successful when they inspire talented developers to do interesting and engaging things. So, the Wii had some innovative internal projects quite early (Wii Sports being a good example) and encouraged a diverse amount of experimentation. The DS was the same actually.
The Wii U is essentially a home console version of the DS where you can move the second screen. Right away it sat in this uncomfortable zone where it was only marginally different and not in a way that anyone really "wanted". Like, touch and motion inputs are intuitive "imagine if I could swing my sword myself", "imagine if I could touch the game world". The Wii U doesn't intuitively feel like that and I think that was obvious to developers early on. There was no flood of creativity for the console, more that developers had to "find ways" to use it rather than just unleash the ideas they had.
Some people might say that part of the problem with the Wii U is that publishers are more risk averse now due to rising development costs. That's true, but are there a queue of top developers on kickstarter asking for funds for amazing Wii U project ideas they have? If there is, I haven't seen the news on here (and I've been lurking for like 4 years).
Any new system they make I think will face similar issues to the Wii U if it offers the same problem - new experiences for the sake of forcing new experiences. Not necessarily because those inputs are bad (I don't think the Wii U's core concept is bad necessarily), but because if their ideas aren't inspiring, then they're not going to gather momentum and support.
I really hope whatever this ends up being, new home console or not, this inspires some kind of creativity from the dev community, something that taps into a latent desire of some sort. Otherwise, I hope they have a solid mobile plan...