A reddit user poking around the Chromecast’s home screen HTML code found some very interesting things. The user, asjmcguire, found that there were references to weather forecasts based on location. Also, photographs and other locations were mentioned. While Chromecast has been growing with its compatible applications, it seems like Google plans on expanding the functionality. This would allow Chromecast to function as a useful standby device as well. Having useful information displayed at all times would be very handy.
Until this feature gets activated, you can admire your own photos with the PhotoWall application.