I recently visited a local museum that was having an exhibit of original art by illustrators. There were original sketches and paintings by Maurice Sendak, Dr. Suess, Leo & Diane Dillon among others.
It was great to see the original pieces. It did make me realize that it is going to more rare in this digital age. With Photoshop and Painter and everything heading toward ebooks there will be far less "tradtional media" art. I like working in Painter (no muss & no fuss) but I do miss having something tangible to hold when finished with a piece.