If they need "validity" added to their device, they've lost before they even entered the race.
The chip is well understood by all the players involved. When a hot chip's been out for well over a year, that's to be expected. Tegra 4's release was a big deal.
So it might be good news for nVidia, but I can't see what it means to a company that has no technology, no channel, and no content.
If Google announces a device with the Tegra 4, it will be so ludicrously cheap that it makes NP-1 a laughingstock. Consider who'd buy a $300 NP-1 from a no-name firm run by crooks and porn merchants when they can get the same thing for $100 run by a large and trusted company like Google?