It's not like any of us can really comment on being in some sort of integrated hive mind, or anything, but I'm sure there's some pros to be had along with the cons.
They've been going on for years about the eventual computer slowdown due to size constraints, but really, as we can apply QM more and more to real-world applications, the sky is the limit.
Actually, with quantum computing, I'm pretty sure the sky IS the limit. That is, I think the limiting factor will immediately become the acquisition of data to compute, not the computation and analysis itself.
I can imagine some years in the future, NASA using a quantum computer to broadcast space probe results live on Google or whatever (presumably by this point Google owns 10% of the globe). Oh yeah, that'd be neat.
Edit: Relevant links,
http://en.wikipedia.org/wiki/Quantum_Computing