Digital Extremes, the well known Canadian developer of Epic Games' Unreal series, have released a teaser trailer of Dark Sector. The trailer is impressive to look at but becomes even more interesting when you pay attention to its creator's claims. This, according to Digital Extremes, is what games will look like on the next-gen machines such as PS 3 and XBox 2. The company does not claim to have used any official PS 3 or XBox 2 development kits but rather to have used the potential specificatio…