Gears of War 3 is an FPS with quite a few trailers and a beta.
Skyrim is an RPG with sparse screenshots and one trailer.
The average gamer knows what they're getting with GOW3, but even the most hardcoe TES fans are still unsure about a lot of key aspects of Skyrim.
Monday's E3 demo should give people a better idea of what to expect from the game, leading to more preorders.
Gears of War is actually a third-person tactical shooter. But it's got guns, chainsaw guns, and as of the third iteration, boobies. So yeah. Definite Bro-bait there. Not that there's anything wrong with that, Gears of War is one of the few "Shooters" I absolutely love, because of it's unapologetic "Michael Bay" feel, and great aesthetic design.