The artist is Gérémy Arène. His tools are the Samsung Galaxy Note 2 with the S Pen, and the Sketchbook Mobile app. The result is amazing. 

I tried to say it before when we first saw the Galaxy Note 10.1. These are more than Android phones or tablets. The S Pen and Wacom digitizer makes them a real appliance. Gérémy says it better in this 10-minute video than I ever could.

Source: PhonAndroid (French); via +Cory Teague