It might not seem like the case right now, but I think the real disruption is just about to begin. OpenAI does not have in its DNA to win, they're too short-sighted and reactive. Big techs will have incredible distribution power but a real disruptor must be brewing somewhere unnoticed, for now.
And just like Dropbox, in the end, what disruption? GPT will just be a checkbox for products others build. Cool tech, but not a full product.
Of course, I'd love to be proven wrong.