Update on the new Boost Mode of PS4 Pro since many have already been using it for dozens of games:
So far basically all games seem to profit from that mode. It does not only boost the framerate significantly but it also reduces screen tearing, loading times and it helps dynamic resolution games to mostly hold 1080p. Texture streaming (textures loading too slowly) seems to also have improved in games that had problems with it.
Some games with confirmed improvements (source:
http://www.neogaf.com/forum/showthread.php?t=1340529):
- Assassins Creed Unity (infamous for its bad framerate) runs a lot smoother now
- Just Cause 3 (infamous for being almost unplayable) runs a lot smoother now
- GTAV runs now butter smooth even in the city
- Rainbow Six Siege runs at a higher uncapped framerate
- Yakuza 0 runs at a higher uncapped framerate, hardly any screen tearing anymore
- Dark Souls 3 runs smoother, animations of enemies in the distance run smoother too
- Bloodborne runs smoother
- Until Dawn runs smoother
- Fallout 4 runs smoother
- Dying Light runs smoother
- The Witcher 3 runs smoother, the new in Blood and Wine introduced menu isn't laggy anymore, faster load times
- Final Fantasy XIV runs smoother
- Battle Field 4 runs smoother
- Batman Arkham Knight has hardly any screen tearing anymore
I'm going to stop here. Basically every game now runs better. In the Neogaf link above are lots of videos to be found if you are interested to see it for yourself.
Sony finally releasing the full potential of the Pro for every game is imo a complete game changer. I guess many will now want one after all.
They likely didn't do it from the beginning since it could have lead to unforeseen problems (that's why you also still can turn it off, just in case) and it needed more testing. Fortunately there seem to be no problems and just improvements so far though.