Apparently the 1.70 version of the PS4 firmware isn’t the only update coming to the PlayStation family. The mobile-based PlayStation App will also get an 1.70 update. The current version is 1.60.5
The only feature confirmed (for now, there may be more) for the new version of the app is the ability to snap your profile picture on your mobile device and upload it to your PS4, as you can see from the screenshot below, showing the notice already hidden in the current PS4 UI.
We’ll have to stand-by and see what further features will be introduced with the new update, if any.