I have produced a little display using the Jeelabs Graphics board:
I am not sure how useful this is. It is a bit like OpenEnergyMonitor’s emonGLCD
I have a DS touch screen that I experimented with a while ago. I could turn this into a touch screen display.
It might be useful to have on the wall in the living room, but in general I prefer using Android devices or web consoles to display the home automation data.