There was a time when most games had a demo. Not every game, but a very healthy portion of them. You got to play an hour or two of the game and get a real idea of how it played.
Developers don't really do that anymore. Some games have demos, and those are great, but it's a much smaller percentage of them.
Now, I think that demos are the most pro-consumer thing possible. You can make your shitty game look awesome if you just show a video of somebody playing your game. You can never understand how the game actually feels and get shown a very deliberate, very scripted example of the game as the developer wanted you to see it.
What do you think, fellow poop heads?