Sony have released PS4 firmware 4.70 a few hours ago. It is unknown what changes this firmware brings, but it could be patching some vulnerabilities.
PS4 Firmware 4.70 brings the typical stability improvement that is usually synonymous with vulnerability patches. However, so far tinkerers have yet to publicly confirm if this update impacts any work in progress of the hacking scene.
Some reddit users have mentioned that the update brings slightly different logos for various Playstation brands such as PS Plus.
As always, if you run a hacked PS4, or hope to run a hacked PS4 at some point in the future, it is recommended to stay on as low a firmware as you possibly can. Hacker Qwertyoruiop claims he has a PS4 Kernel exploit that works up to firmware 4.55. The exploit has not been released though, and the developer has not commented yet if his hack is impacted by this firmware update. Of course, this firmware update 4.70 is required to access the PS4 online features, so you’ll have a choice to make. (As far as I’m concerned, I now have a second PS4 for gaming, and an original one waiting for a public 4.0x hack release)