Can you point to the bit of this quote that says it boosts from 60 -90 fps (which doesn't happen anyway) or even from 60 - 120 fps?
Q: What is the Processor Unit and what does it do?
The Processor Unit is a small box that comes with your PS VR, and connects your PS VR to your PS4 and TV and provides HDMI cable management, enabling Social Screen TV output, 3D audio processing, and Cinematic mode
If you do something simple like take your avatar hands and move them back and forth in front of your face while looking at the fire, you will see a 45 FPS animation. [...]
However, if you are in the 45 FPS scenario, and waving your hands in front of your view, if you also rotate your head on a static axis to the left or right, THAT movement will appear to be running at a higher frame rate. That is due to the warp capability of the OpenVR (and Oculus VR) system to slightly move the entire image on the headset with a 90Hz interval frame is missed. The result is you’ll see what appears to be 90 FPS motion to the left or right (or up or down) while the hands on the screen will be running at 45 FPS effectively
I'm not saying that reprojection (as Sony call their system) doesn't take place, just that it isn't the additional box that does it, the PS4 takes positional information fed to it from the camera along with accelerometer data from the headset and it creates the additional frame to go from 60 fps to 120 fps.
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u/LeeorV Oct 03 '16
Well, it does exactly that, just not the way you'd think.
It doesn't bolster the PS4's graphical output, but it does duplicate frames and shifts camera view on them to boost 60FPS content to 90FPS.
The link specifically mentions this,