The thing I’ve mentioned in other venues is that while higher resolution headsets than the Rift S have arrived and garnered lots of attention, less well known are the problems current and probably near-future hardware has and will have outputting stereo images at acceptable frame rates.
Already the Samsung Odyssey is pushing the limits, especially for sims, which tend to run much better on the lower resolution Oculus Rift.
With the Rift S, I believe Oculus has made a technical judgement call and balanced higher resolution against slightly lower screen refresh rates to maintain its lead in FPS.
I think it will probably be a winning compromise, bearing in mind that the Oculus also has a much better software interface (It just works) and much, much, MUCH better controllers.
At a comparable or even lower price point than its competitors, apparently.