The fact that you guys are on this forum obviously means you can read and thus see. So why don't you read a few previews and within a few weeks some reviews and watch some good new screenshots and gameplay movies?
Because I can do that for other games that HAVE demos and cost the same amount of money.
You can not disagree that this isn't enough for you to consider wether it's a good game or not
Actually, I can. I fail to see what logic you subscribe to which allows second-hand opinion and marketer-produced videos to be a worthy replacement for first-hand experience with the game.