It WILL indeed be the new standard resolution, very soon, especially considering the "push" the PC industry is getting from Apple's Retina Macbook Pros. The demand for high res panels is just to darn high and it has to be met. Like in Apple's situation, the cost can be taken care of by charging a premium and then using economies of scale to bring down production costs and making these kind of displays the new norm.
But exactly when this will happen? Well, it sort of already has: http://www.engadget.com/2012/08/31/samsung-Series%209-WQHD-U...
However, I believe we're going to see a huge blast in these super high-res panels right after Intel Haswell is released. It'll provide the Ultrabooks with graphic performance capabilities that'll be good enough for these high-res panels.