They look like pilot chairs from a chopper and you sit back in them with the screen tilted in front and the keyboard in front of you.
The Aeron chairs made by Herman Miller are very popular (also very expensive) as computer chairs. They are designed for extended occupancy and comfort by allowing them to adjust in several directions. About $800-$1000 per chair when I last priced them. There are executive leather chairs for $250-$350 that I find sufficiently comfortable.
