The DualShock 4 was designed from the start in order to work with Sony's VR headset Project Morpheus, according to SCEE senior designer Jed Ashforth.

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Speaking to TechRadar , Ashforth revealed the light bar was included because of the development of Project Morpheus, though the secretive nature of the headset caused issues when complaints about the bar started to flood in.“The tracking light… it was our department that said we need that on,” said Ashforth. “It was for tracking for VR, and when all these things were coming out six months ago and everyone was going ‘it’s reflecting in my TV,’ we were going ‘oh no’ because we couldn’t tell anyone what it was for.”It's good to finally know what the feature is for, as many people were uncertain due to its lack of major use thus far. The most recent PS4 update has made it possible to dim the light bar , which is a feature many have been angling for for a while.

Luke Karmali is IGN's UK News Editor. You too can revel in mediocrity by following him on Twitter