they seem to have used a file photo from 2007 NYT story that has a toy robot. Hmm, bit tricky - to average person I think the photo suggests THIS is an example of the robots he's working on, no?
More likely he just was hard to schedule for a photo shoot, so they used a file photo and this was better than a headshot of him speaking at some conference. Unless there were new robots to show from Google, it wouldn't add much to take a new photo.