I'm not a techy so I may be off with my speculation.
Lets suppose someone with a super computer, such as china with their Tiahne-2, decide to start mining bitcoins. Wouldn't this one computer, doing 33 Petaflops/s, push everyone else out? Maybe I am just crazy and lack some kind of understanding, but if someone was able to use these super computer to begin mining, they wouldn't give anyone else a chance.
I guess I am waiting to see what going to happen when a few college kids with access to these supper computers start mining with them for a weekend or two at a time.
What do you think will happen if a bunch of super computer begin mining? would the public notice? Is this already happening?
What if someone hacked one and began using it to mine for themselves?