PSVR 2's haptic feedback might still use a PS4 controller's rumble motor

gamesradar.com:

A recent post on the PlayStation Blog revealed the R&D and hardware iterations that went into the development of PSVR 2, and it's been confirmed that one prototype used the PlayStation 4 controller's rumble motor.

Haptic feedback continues to be a bespoke PlayStation 5 feature, and in the world of the best VR headsets, it's entirely exclusive to Sony's latest visor. It now comes to light that the earliest iterations of this feature saw mechanical design engineers using rumble motors from the DualShock 4 to make it happen.

In an interview with the PlayStation Blog, Yasuo Takahashi, SIE's Principal Product Manager said that "Mechanical design engineers removed the rumble motor from a DualShock 4 wireless controller and attached it to PS VR to try it out.

"They found that it actually increased the feeling of immersion and sense of reality, though there were challenges when trying to actually integrate the feature into the headset."

After more testing, it was then found that one of these motors could also be used in tracking headset movements:

"That’s why we created the next prototype, “Eye Tracking Evaluation Prototype Part 2” with a built-in motor, and tested how the motor affected eye tracking and head tracking," Takahashi added.

This is a clever continuation of the PS4 controller's design, as the DualShock 4 had an innovative feature that would help the console to anticipate usage if the motors inside the gamepad detected movement. This is why, if you left your PlayStation 4 turned on but went to another room, for example, the screen might dim, and moving the controller in any way would make screen brightness return.

The original prototype that includes the DualShock 4 motor can be seen below.

It's unclear whether that