One, it was delightfully messy. I say delightfully because I had expected it to be clear and minimalist, especially being that he must have prearranged to be photographed. It looked like the desk of someone who was busy doing stuff, not just thinking about doing stuff.
Secondly, there were a large number of harmonicas on it, presumably in different keys. Steve had made his love of music well known but I had never seen any evidence that he created music himself. I know have visions of him tooting away on these as he worked. It also makes me wonder if he played with Garageband.