Comment by globular-toast

That's foveated rendering. Foveated streaming, which is newly presented here, is a more general approach which can apply to any video signal, be it from a game, movie or desktop environment.

They are complementary things. Foveated rendering means your GPU has to do less work which means higher frame rates for the same resolution/quality settings. Foveated streaming is more about just being able get video data across from the rendering device to the headset. You need both things to get great results as either rendering or video transport could be a bottleneck.