If you haven’t seen the David Hockney exhibit at the San Francisco De Young Museum, it really is a must see.  I expected to be under-whelmed thinking it would be nice to see Hockney’s swimming pool paintings in person, but what we saw was an incredible amount of work produced by the 76 year old painter on canvas, on the iPad and iPhone.  He used his iPad to do a time-elapsed video of a road through a grove of trees during each of the four seasons.  He used these images to create an installation on 4 walls facing each other of 12 screens each, synchronizing the separate videos.  He created paintings of these images.  He created prints of these images.  There was an installation on another wall showing the sequence of his stylus strokes on the iPad.  Then there were series after series of Hockney’s portraits.  Some head-shot portraits.  Some life-sized portraits.  Full of color and massive in size.  Room after room of paintings and videos and installations showing the artist at work.  Impressive.