Yep, Nexus would be perfect. It works kind of like Airplay but it doesn't rely on the device to actually send the content, all it does is initiate the stream on the Chromecast and the Chromecast does everything from that point.
Have you tried sending content from a device running Chrome browser to the Chromecast? I have to choose between ATV or Chromecast. Chromecast makes more financial sense as I already have a Roku 3 for netflix, Plex, hulu ect but need something to watch live streams via my TV. I almost purchased the Apple TV but then watched some reviews of the Chromecast and if it does what it says it can do, then will go that route but just need someone to confirm that it will work as I want it to.