This was done with Asus EEE Note EA800 which has 8 inch gray scale LCD, Linux based system , and Wacom Pen with pressure sensitivity.
Sadly, ASUS didn't continue to advance this product which I though has a lot of potential, and it only costs 230 US Dollars. Current version the hardware was great, but the software support is weak.
I did these drawings from last weekend when I visited Legion of Honor. They have some really good collections in the museum, and I found out Rodin has some of the best composition pieces in this museum.