I am setting up something like this, not really for a control panel but as a replacement for my wall switches. But it might as well do as a panel 
This is just my PoC with:
- Raspberry Pi Zero W
- Pimoroni Hyperpixel 470
This ends up being a square 8cm x 8cm touchpanel (720x720) with Linux, video capable. Nice starting point.
I am creating a dedicated topic to follow up, and if there is interest I will try to make an “Open Source Hardware Touch Switch Computer”.
My own requirements:
- It has to be “nice & cool” (otherwise my wife would never allow me to install them at home ) No visible wires or electronics…
- Directly pluggable on a wall switch (this may require specific HW, which I can design), I will make an alternate version just connecting to some USB source on the back.
- “Plug & play”… no Linux setup / maintenance needed (at least to use it out of the box)
- Nice simple interactive UI (full screen HTML5), video and photo capable
The Pimoroni screen is cool (works nearly out of the box), so good for the PoC but it has some drawbacks:
- The connector on the back places the rPi too on the border: the SD card becomes visible on the side, and does not allow for something to hide the electronics on the sides.
- It is expensive, so multiplying for the amount of switches at home…
So I am looking at some OEM touchpanels (plenty of options in alibaba) and may try to develop my own interface (and get it done in China), but it may take some time: so, by now, I will work with the Pimoroni (alternatives welcome)
I am a hobbyist with limited time, so please be patient if interested
Pedro