Wouldn't the Chromecast be just the dream signage player: small and cheap? Unfortunately it isn't, because there is just one thing that it can do: stream video (mainly from the internet). It won't allow you to run any web-based content, like a Hi-Def Signage channel.
We're mentioning it here, because we get asked a lot if the Chromecast is an option.
Actually, we must not discard the Chromecast entirely. There is one way to play Hi-Def Signage content on the Chromecast. But that requires you to actually run the Hi-Def Signage channel in a Google Chrome browser on a regular computer and then streaming that browser's content to the Chromecast. But obviously this defies the whole purpose of using a Chromecast, since you now need an extra computer to pull this off.
So in short: the Chromecast is unfortunately not an option.