It didn't take mobile apps with the launch of the iPhone 20 years to add to the economy though, did it?
The iPhone killer UX + App store release can be directly traced to the growth in tech in the subsequent years its release.
We might have been possibly better of actually, with the Apple walled garden abominations and user device lockdowns not being dragged into the mainstream.
Not clear that this is a helpful interpretation, other than "we're in the primordial ooze stage and the thing that matters will be something none of the current players have", but that's hard to take to the bank :-)