This highly redundant patent may simply be the renewal of the idea, applying it from the DualShock 4 to the DualSense. Which could make some sense, since the accessory came very late in the PS4’s life cycle.
No doubt if it comes out as a purchasable product, it will be highly welcomed, especially for certain games that could use the extra buttons. But there’s every possibility that the patent will remain just that. After all, Sony has just one patent like that, and quite recently too: the integrated back button patent didn’t materialise into the DualSense.