I don't care what it says in the specs, there's no VGA input in that picture you posted. Also, you won't be able to control the Mini with the touchscreen.
So, if you want no control over the Mini and a crappy picture, that is the unit for you. Otherwise, buy a touchscreen with VGA inputs and a USB connector. You don't have to buy the sunlight readable one, although you'll probably wish you did sometimes. The other screens work reasonably well.