Am I the only one that doesn't consider HL2 a FPS? It's a FPA/AG to me (made that up right now) First Person Action/Adventure Game. A FPShooter has to have its main gameplay be about shooting people. Quake III Arena is the very best example to me, but it's precisely because HL2 gives you awesome story telling and immersion that it just falls outside of that category. When you see Episode I has an achievement for finishing the game firing a single bullet, that just says something about the classification as FPS. These days any game that offers a FP view is called FPS, and it's just detrimental.
Gears of War was a lot of fun playing Coop, the first encounter with the berserker certainly ranks way up there in the very best gaming experiences I've had in the past 10 years. It's just not a game I can see myself playing solo or online. And why anyone would expect the second opus to look a lot better than the first is beyond me. The first doesn't look dated, players have grown used to the first game's visual style so making them go to the same universe is a given. As a sequel, this game will deliver on all aspects. More action, more features, more enemies, more weapons, and increased cinematics like quality of gameplay.