Even with these restrictions, the feature could be massive for Twitch. Soccer fans, for instance, could take a break from FIFA and Football manager by watching All or Nothing: Tottenham Hotspur. A film critic, meanwhile, could review any number of movies in real-tie with their fans.

Watch Parties are a unique combination of Amazon-owned properties. There’s no Google-built Netflix rival, for instance, (sorry, but YouTube Premium doesn’t count) to offer YouTube streamers. Facebook has dabbled with premium TV shows like Limetown and Sorry for Your Loss, but none have resonated the same way Netflix and Amazon’s best originals have. If they want to clone Watch Parties, Google and Facebook will need to partner with another company — Netflix, HBO, or something of a similar caliber — that makes the kind of shows people want to watch together.