Except we have no indication of the entire industry shifting to make a bunch of Wii U exclusives.
Of course, exclusives are less common now but it doesn't mean the Wii U won't get exclusives, just like PS4/720.
Nintendo, Sony, Microsoft all have to prove something next gen
Nintendo has to prove that they can get good third party support and good online if they can prove that then they are set.
I don't think it's really an OK jump over PS3/360, at least from what we've seen so far. It's nice that it has 2x more memory, but whatever jump over them it has needs to manifest in games they're showing to mean anything. Otherwise, for all we know, some terrible CPU bottleneck could be nullifying whatever other advantages it has on paper.
Launch games don't show what a console can really do (example Xbox 360), we know the Wii U uses modern architecture, more p owerful GPU, and a confusing CPU, the CPU is OoO and we know it's slower but we don't know if it's weaker which I don't think it is, the Wii U is a decent/ok jump over the PS3/360, the rumors of the PS4 and Xbox 720 specs are also decent, they aren't full generational leap like people expect, that is if those are the legit specs.