This is a brilliant piece of analysis, useful for tracking down a slew of hard to find networking issues at relatively low cost. Of course, the biggest use will be for helping to reduce the latency in the routers at Wall Street.
Why is this important? Here is Karl Denninger's explanation of "High Frequency Trading"... which should make it crystal clear.
Technology has a bias towards specialization... in this case let's try not to let this "invention" (actually a clever idea and simple algorithm) be used only for evil.