One of the comments in the older threads mentions how the Multivac represents the opposite of what we got today, because we have so many computers running at the same time (phone, laptop, tv, and tablet currently around me, for instance).

I can't completely agree. Although all these devices might work by themselves. But they are not complete. Each of these machines is currently running software that actively connects one or the other cloud service. Isn't what we have pretty much that Multivac thing? It's not a single big blob somewhere on this planet, but this just makes it way bigger.