Now, looking back, it makes sense that the next logical step after PCs was the Internet. But from each era looking forward, it's not as easy to see the next "horizon".
So, if each next "horizon" is hard to see, and the paradigm it subsequently unlocks is also difficult to discern, why should we assume that there is no other horizon for us?
I also don't know if I agree that we are at a "logical endpoint of all of these changes". Is computing truly continuous?
However, I think Ben's main point here is about incumbents, and I agree that it seems it is getting harder and harder to disrupt the Big Four. But I don't know if disruption for those 4 is as important as he thinks: Netflix carved out a $150B business that none of the four cared about by leveraging continuous computing to disrupt cable & content companies. I sure wasn't able to call that back in 2002 when I was getting discs in the mail. I think there are still plenty of industries ripe for that disruption.