The previous Ars article indicated that "Boost Mode" was part of the planned features tied specifically to how the architecture of the PS4 Pro's chip was designed (the GPU of the PS4 Pro is ...

The new Boost Mode in the PS4 Pro offers substantial performance improvements, even on titles that haven't been patched to support the PS4 Pro's new hardware. Gains of up to 38% have been seen to-date ...

Sony's forthcoming firmware update for PlayStation 4 includes a "Boost Mode" option for PS4 Pro users, improving the performance for games that don't already feature enhancements when played on Pro.

Not sure why people are surprised at "boost mode" - to me the only surprising thing was that this was a feature Sony had to build. I would expect more powerful hardware to *of course* give existing ...