Chromecast has proven to be a very useful streaming device. If you have it at home, I'm pretty sure you've been enjoying casting funny babies and cat videos. And when you have guests over, everyone just wants to get on it and share new discoveries on YouTube. Now, Google made it easier for your guests to cast without having to connect to WiFi at first. The guest mode allows any Android device user in the same room to cast to the host's TV easily.