Actually, the Unreal engine doesn't have multiple iterations, like Q1 engine, Q2 engine, etc, it's a progressive release. I considered that fact many times. I think that it will utilize the latest Unreal engine technology, simply because it's built in. Still though, I'm sick of waiting. Even if I can open every door, shoot out every wall, hell, even if I can build custom sandcastles on the beach, that level of interaction isn't worth 5 years of "when it's done" PR crap. I know the bar they hoped to hit was "a new level of interactivity", but there is such a thing as overdoing it.