Photowall for Chromecast allows you to send photos to a TV via Chromecast. Great for parties or weddings, Photowall creates attractive animated montages on the big screen.
The Photowall for Chromecast app lets you collaborate with others to share photos on their Photowalls, or create your own. The setup process isn't as smooth as it could be and I often encountered error messages when trying to start a Photowall.
It's an experimental app at present, but it's a concept with lots of potential.