Sad that I know this, but that isn't a Lisa in the background, it is a Apple Macintosh 128k, released in January 1984. The Lisa was released about the same time, and though it had the much the same profile as the 128, it's face was twice as wide with the monitor set to the left.

And wow Bill does look the Nerd, Jobs doesn't even rate the complimentary 'geek' moniker in this picture, much more the very early dot com pioneer look sported in the mid to late 90's (or did he give the dot com crowd the look to achieve?).