Just been to see War of the Worlds. It was absolutely brilliant. Okay, so Spielberg has played with H.G.Wells plot slightly, but it doesn't matter. What is important is that he has kept the main elements of the story, which after all is about a hundred years old. So what if he has taken english, middle-class victorians (from Woking, which apart from the McLaren Factory, would be vastly improved by an alien attack) and turned them into working class americans. The most important thing is that for just short of 2 hours it kept me in my seat, with my eyes glued to the screen - and it scared the crap out of me.
See it. On the big screen. If you don't you will regret it later.