Just comparing to World of Warcraft, which I think is fair considering how many people play it, and it's success. I use a high speed, low latency DSL connection (and pay a premium for it) and have latency of 70-150ms. Most of my friends have a latency around 200-350ms, and many people in my guild play with a latency around 500-700ms.

While I'd be willing to consider the possibility of someone improving on existing technologies, I have a hard time believing that an end-point can cut latency in half from a best-case scenario. Especially considering that most latency issues are not the problem of the end-point, rather the hops in between.

With WoW I gotta go with an overstressed end point for latency issues. Most shooters you want to keep your ping under 100, MMO's aren't as speed intensive of course so this service could work out for those without adding much at all to the overall latency.