I think he’s talking about Do Not Track? That’s a signal that’s been in web browsers for over a decade now, but because of a lack of legal enforcement has largely been ignored by websites. To my knowledge, there’s no equivalent signal in Windows, macOS, or Linux. Though none of that stops individual app developers from putting in a setting into their app’s settings/preferences. And heck, the bill only required it to be opt-out, so in reality it would hardly have any impact on their bottom line, thanks to the tyranny of the default.