I recently ran across this and fell in love. I recently ran across this video of the Azentek SmartMirror.  It is a mirror with with a 4" screen built into it with integrated Navigation and Bluetooth. It is running navigation from Navigon. It also includes two additional video inputs. I have yet to find anybody selling it, but was supposed to be on sale the 1st of August for about $800.00.

What do you think?