From PsychoSquad: “Braindance is a pretty major element of Cyberpunk 2077, both in terms of gameplay and worldbuilding. In the future, Braindance works as a more tangible version of VR, where you can feel sensations as if they’d be real thanks to brain implants. Braindance footage is often used for investigative purposes during the storyline.”
Source: N4G PC Cyberpunk 2077 Braindance Editor Guide