Video chat would be great, heck since it can run native C++, it might be able to do really performant video chat compared to Java based solutions, what would be really awesome would be some l33t h4x0rs reverse engineering the other video chat protocols and making a OSS client that's compatible with the other major clients, like apple video chat and google video chat and microsoft video chat and zoom video chat and uh, whatsapp video chat, etc. Then you have like one app with notifications that can just handle all the other video apps and connect to them and their protocols, like how Pidgin used to do instant messaging with all the other IM clients back in the day.