Re: A slight to Tim Berners-Lee
What are you getting at? The WWW is not a "GUI system", and has nothing to do with Smalltalk.
AHI's NLS is often cited as the first GUI. It was publicly demonstrated in Englebart's Mother of All Demos in 1968. Smalltalk was first released in 1972. So Smalltalk certainly was innovative if it could have been the precursor of a system introduced four years earlier.
GUIs are not inherent to Smalltalk. In fact I think Smalltalk-76 was the first one to have anything GUI-related in it.