i think people are missing the point...
Guys, this movie really is meant to be more than another Crank-type action movie. I kept thinking "Idiocracy" when I watched it the first time... The best way I could sum it up would be calling it a fusion of "I Robot" and Idiocracy. Some other posters mentioned BladeRunner, which I can see somewhat as well.
I think the primary intent is to point out how totally immoral and out-of-control modern society has become. And from that perspective, I think the movie is quite successful. The really scary thing is that this movie really isnt that far-fetched in terms of what is happening to society right now.
Michael C Hall was awesome in this role, as it seemed tailor-made for him and his "brilliant lunatic" acting style. I also think the interaction between him and the talk show host was great, further highlighting the total dissolution of ethics and morals in everything from news to politics. Gerard Butler was OK, but nothing new for him. Personally Im a bit tired of seeing him in everything now, but he can still whip some serious $^&*... I even think Simon did a good job at acting like a spoiled little brat. He definitely had the coolest role of any kid in a recent movie...his home entertainment setup was incredible.
I also really liked the production style of the movie. The color saturation and palette was really cool, IMO. One annoyance was that they kept showing psuedo "glitches" in the video feed of some of the action sequences. The point was to highlight the fact that it was virtual and introduce the "ping" delay, but it became annoying quickly.
Oh, and I liked that they showed the little hover-cameras that were following the players around...it was a nice detail. At least it tried to explain how people were getting a 3rd-person view of the action without people filming directly. Nice detail I thought.
Anyway, I would suggest people not judge Gamer as just another action movie. It really tries for more... whether or not you think it succeeds.