The absolutely killer feature of the Chromecast is that I can have guests over (or be visiting someone), and anyone can stream any content they're authorized for. Movies I've bought can be watched anywhere there's a Chromecast; my buddy can come over and we can watch something together with his Paramount+ subscription. Keeping the accounts and authorization linked to personal devices, and letting the Chromecast essentially be a way to translate that to a bigger screen without having to actually stream it out of your pocket is fantastic.