It hangs underneath the main crossbar and aligns itself with the frame of the bicycle, which means that your legs should not be able to come into contact with it, accidentally knocking it off during your ride. Granted that this could be an interesting way of carrying your Galaxy Tab 10.1 around with you, according to 14 Bike Co, it can be used with a variety of Android apps to record mileage, plan your routes, download repair instructions and etc.
If you’re an avid cyclist who owns a Samsung Galaxy Tab 10.1 and this sounds like it could be something you’d be interested in, the bike is unfortunately a concept at the moment, but it seems that if you contact them directly, they will build one for you, which is not surprising considering that their trade is in custom-built bicycles.