Make your idea even greater !!!
Just few tips how to get your idea even further.
- Make some open hardware connection interface to your tablet
- Make some hardware board where you can plug arduino compatible shields so they can be controlled by your tablet
- Make this devices programmable with QT project (http://qt-project.org/)
- Make the case printable in 3D printers for industrial usage which will hide all connected hardware inside
This will push your project even to other communities and sphere of business. You can control any hardware and unlock new world of possibilities :)
May God bless you.
Peter from Slovakia