It’s not unusual for pre-recorded backing tracks to be used to augment live performances; to make them sound as close to the original recording as possible, and create a more complete experience for the audience.

That’s the basic objective behind Philips’ Ambilight (‘ambient light’) technology; a row of LED lights on the back panel that mimics the colours on the screen in real-time, emanating a soft glow of light around the TV.

Ambilight aims to make TV-watching a more immersive and inclusive experience; to act as an extension of the TV screen.
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https://www.whathifi.com/philips/55pus7181/review