Even the fastest computers in the world all working together would take years to do a complete scan, and this is only a one-shot scan. The key thing about these problems is that they are geographically spread. Even a personal computer of infinite power can't solve such problems because you can't bring all of the required input into such an environment. You have to take Mohammed to meet the mountain, not the other way round. Sadly enough, that word isn't sexy any more.
Multiprocessing is already the order of the day on such computers.
I'm going to go out on a limb here and state flatly that the servers won't be running Windows. They will most likely be running some descendent of Unix. Unless this changes, it won't be reasonable to use most of the server's computing power on a user interface that is only used by the system administrator. The use of multiprocessing will certainly be accompanied by the introduction of new CPUs. The flattening of CPU clock speed will put much pressure on designing new CPU architectures that make as much use as possible of the clocks that are available.