Linear resolution maybe not, but pixel count is roughly doubling. Vive and Rift are both ~1k x 1k pixels per eye, first gen Windows Mixed Reality headsets came out a year or two later and are 1440 x 1600, and the just-announced HP Reverb is ~2k x 2k. The teased Valve Index is likely to be 2k x 2k as well, with a field-of-view bump from 110° to 135°.