I think there should always be a demo. That's sold a few games from PSN to me that I would've never considered otherwise. Of course there are games that I don't even look at that do have demos but if it's marginally interesting I'll download it and give it a shot.

Of course Wipeout HD was something I've been waiting for since I got my PS3 a year ago so that doesn't count. But I'm sure they would have sold more if there would've been one right from the start.

Weird thing though. I spend some time on the Playstation forums and there's been quite a bit of discussion on just how hard WOHD is and many people are frustrated playing it and give up (even after the update). I'm not sure how to take that. I can't understand why people want something they zoom right through. I suppose it's instant gratification that people want now.