Its not like you couldn't afford to buy a little pipsqueak like Via
Buy? VIA and Nvidia have similar revenue (4-5B/yr). The only thing that could happen would be a merger, and that would never fly because Jen-Hsun Huang would insist on running the combined company.
And there's no guarantee that the VIA x86 license would still be honored after a buyout. I believe that's one of the reasons nobody has made a move to purchase them.
Imagine laptops and tablets that could run full windows and Linux when plugged into the wall but when on battery you would switch into "uber battery" mode and get ARM battery life with none of the downsides...who wouldn't want to buy that?
I think you overestimate the demand for such a complex machine, and also forget that only since last year have you been capable of running Windows on ARM. The real solution has been to add all the ARM power optimizations to the Intel Atom, and now Haswell, so that you can get all-day battery life without compromise (and with no added hybrid system cost).
As for the value of the VIA Nano, it's reasonably impressive, but not suited for phones or tablets. A single core still uses at least 4w, but perhaps better process tech could help. A merger with Nvidia would have fixed ONE SERIOUS PROBLEM for VIA: their shitty chipets, and terrible IGP, and crappy drivers for both.