I considered an android device as a touchscreen. I eventually bought a Shuttle all-in-one PC (based on an Atom CPU, http://us.shuttle.com/X50.aspx
). I put it onto a wall on a central location. Things I noticed during my decision for a touchscreen:
- Capacitive is nice, but not necessary for a home automation display.
- Larger screens are a plus. You can create a display with all sorts of information (traphic, weather, house, reminders, etc).
- Android is nice, but a full operating system is also nice. I added a webcam server onto my touchscreen which acts as a camera four our living room as well.
- More power and multitasking makes it also my voice recognition server.
- It opens up possibilities!
- Making it a dedicated device as your home control panel is very important! Otherwise as Henk_J also noticed it is being used for something else and won't add value to your automated home.
- Check if it is capable of an always on mode. The effort in bringing the panel up (executing an application) is too much already imho.
I see two sides. One simple, small and mobile touchscreen as a "remote" for your home and a fullsize panel for information delivering. Think about what you are looking for.