These days, I avoid as much games marketing as I possibly can. Because I've learned that hype just serves to get me to miss buy things. If a great game comes out, and I've never heard of it, chances are that I will once it comes out. I will then play it. Will the kind of game that gets hype ever: come out, be amazing, and I won't hear about it? No, that never happens (I obviously can't prove this). The games that might slip through anyone's radar are precisely the ones that don't get hyped, small team, foreign, niche (like if an amazing game for the unsighted came out).
I still pay attention to what games are coming up, but if it's not playable (either a demo or for sale) I don't bother. Even if it's a company with a solid track record for me. New Half Life 3 trailer, I wouldn't bother. Either it's good or not, but it doesn't matter until after I can play it, at which point reviews will exist.