This would be an amazing option if true but I'm sceptical. Why isn't anyone asking:
1) What the source even is. All I've seen so far is a screenshot of a JPN-language settings screen. Where did this even originate from? The media, which are reporting on this, are just linking back to GAF, not even the primary source!
2) Whether Sony would actually do this. Sure, it's a "use at your own risk" setting, but you can imagine plenty of end-users turning it on for games which are old, but which they are playing for the first time. Would first-time players even notice if the game isn't operating correctly?
I don't know, I like the idea of it, but I wonder how it'll work. N3DS homebrew allows users to activate the extra power of the system for non-N3DS-enhanced games (4x 804Mhz ARM11 cores with 2MB L2 Cache), but a few games become literally unplayable or lock up.
PS4's extra grunt lies in the GPU - an opposite situation to N3DS's which was a CPU-heavy upgrade. Is that more or less prone to issues if Sony just switches on the other half of the PS4 Pro's GPU?