Don't believe a word that's being said/written about 3rd party support interest. That's a vague statement, number one, so we could be talking about the same slate of 3rd party support they've had for Wii U in being interested (Platinum, Sega, Ubisoft). Number two - it's the same thing that was said of the Wii U before it fell flat, and given how 3rd parties have continued up to this point to support Xbox 360/PS3 with downports, the decision to not support Wii U clearly wasn't due to them not being capable to.
You gotta go into a Nintendo platform expecting it to be your "Nintendo Machine" for the time being, let them prove you wrong if you're wanting to rely on one console for your Nintendo & 3rd party needs.