"Exactly." Exactly what?
Things that came out on PC first by a large margin (or exclusive)
C&C3, Crysis, Red Alert (soon), Supreme Commander, Company of Heroes, DoW, Doom3, Half-life 2 (granted, valve), FEAR, Battlefield 2 and 2142, Age of Conan, Sims etc, World In Conflict...
Plus there are plenty of titles that are released on both at the same time such as Medal of Honor: Airborne.
Just to name some of the biggest titles. There's a lot of smaller ones out there (Sins of a solar empire to name one) that are just as good.
So I ask again, "Exactly." what?