EDIT: from a brief read of his wikipedia page:
"Kay has lectured extensively on the idea that the computer revolution is very new, and all of the good ideas have not been universally implemented."
Coming from someone with multiple major accomplishments (OOP pioneer, smalltalk, overlapping window GUI, etc.), that's a powerful message that can still be applied today.
Namely; much of the low hanging fruit has been ignored and much of the world is in a technological stagnation.
Separately they could be made to sound pessimistic, but together there is much reason for optimism.