If he does in fact leave, little will change. He'll be replaced by a less famous person, probably one who spends less time bragging on Twitter about it.
This may not be what Silicon Valley actually does, but it's what a large fraction of the country believes that Silicon Valley does. Trump was elected in part because voters wanted him to run the country the way they imagine trillion-dollar companies run.
So that's what we're gonna get. And I guess we'll find out if it's actually a good idea.