You could also use an IIS hosted website and control it from there. Either a workstation directly connected or a IIS URL.
You can have the rotating MAP HTML page there - I don't do that, but if you need it, it would work - Samsung TV then could load the URL from there.
The HTML page likely resides directly there - though an IIS is possible as well.
Additionally you can have the workstation talk through the TV as for alarms of sensors.
For rotating MAPs - see here:
This gives you additional control, you could reload the same map in the rotation or you can switch between various maps - what I do as well.. a whole bunch..
For text-to-speech notifications see here:
This needs PowerShell remote execution enabled - once this is done, it really works well and it is quite a gimmick - the second we are annoyed in the NOC (network operations center) we just mute the TV - but that rarely happens..
Hope that helps you.