My 2013 Panasonic supports most of the HDMI interoperability features (e.g. streaming to my Chromecast automatically powers up the TV and switches to the right

My 2013 Panasonic supports most of the HDMI interoperability features (e.g. streaming to my Chromecast automatically powers up the TV and switches to the right HDMI port) and UPnP both as a client and renderer. That said UPnP is a fractured standard, so behavior is patchy. Some formats simply aren't supported, and Windows can't figure out how to control volume when rendering to the TV- but that's the fault of a weak standard more than of the TV. There is a remote control API as evidenced by the Android remote control app, but it's probably a closed API.