I am in Australia so Baseball isn't really popular here but alot of sports here have started using cameras and replays for "close call" situations..Actually we have had it for quite a while, I am surprised that baseball doesn't have this.
"Perfect Game" refers to pitcher, right? Was he robbed by the umpire that calls "strike" because in cricket we have a thing called a "subjective call" like an LBW, where the call has to be made by the umpire. Its hard to explain but I guess an umpire calling a foul may see it from a different perspective than the camera angle. Things like catches and run outs can be called using replay technology because they can give a definitive answer.
Anyway, I think the human eye is just way to slow to be able to be accurate on some of these really close calls, so I think that the more replay technology used the better. Some say the human error element adds to the game but with so many replays now people can see instantly if they got it wrong or right so its alot easier to feel robbed by a wrong decision like this guy seems to have been.