Been thinking of getting hold of a touchscreen (to wall mount) and interfacing it with HA. This maybe anything from Audio Control to IP Camera feed.

As opposed to just a touchscreen, you can get hold of a touchscreen with ARM type processor (along with interfaces). This would allow it to run its own OS, providing a GUI front end and sending control messages to various components eg LWRF

My question (as a non-programmer) is, has anyone played with an application package (Win CE or Linux) that can provide a GUI type front end with the ability to send custom macros or control scripts when, say a on screen button is pressed.

This maybe a big ask, but the likes of AMX tablets seem very expensive and I was looking into something more homebrew.