Which gaming company's product development initiative first introduced hand-tracking controllers with individual finger tracking as a standard feature in a mass-market virtual reality system?

The gaming industry has seen remarkable technological advancements in recent years, particularly in virtual reality hardware and experiences. This trivia question focuses on a pivotal product development moment that changed how we experience immersive gaming. Test your knowledge about the evolution of VR gaming hardware that helped mainstream this technology.

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Valve with the Index controllers (formerly known as 'Knuckles')
Oculus with the Touch controllers
HTC with the Vive Pro controllers
Sony with the PlayStation VR Move controllers