First, watch this: Then, read this: Parkour. Then, if you’re still intrigued, watch this: The controls could be a real issue. And it’s possible that the gameplay, like so many other “total first-person” experiences, ultimately won’t work in the end, despite how impressive it looks right now. But as a real demonstration of what the PS3 and Xbox 360 hardware can do, EA and DICE’s Mirror’s Edge is now one of…