Actually, I was waiting for Rotini to support portrait mode so I could experiment with the new version of my wall-mounted Galaxy Tab A.
But reading now that no centrally manageable (in the best case text-based) configuration is possible, I really have to look back to Habpanel with a Kiosk mode browser now. At least there, you can experiment with a setup on your main computer, and then “save” back to the server and reload it on the wall-mounted tablet.
My reasons for text-based configuration are very similiar to the ones @Cooc1967c listed two posts up. One thing I did not see in his list is that your client may die (whether it is a tablet or a mobile phone), in that case I really need to just buy a new device and put it onto the wall. If I would have to tell the other persons in my home that “I just have to set up the panel, and it will take me next weekend to do it, and then I am not sure that I will be able to re-create the same setup”, they would forbid me play anymore with mission-critical stuff like the lighting 
Also, see Export/import configuration which would not be possible with client-only storage.