Sony and Nintendo have some premise that they have displayed/detailed.Some of the things discussed by both companies include;
From Nintendo- Legend of Zelda-skyward sword on wii,3DS(having OoT and MGS3 remakes

),a new Kid Icarus game

Dragon
Quest IX(can't come soon enough-a game I completely forgot about).A new Donkey Kong Country game(doesn't have any appeal to me).
Sony did have some things I was expecting and was anticipating. There was no info regarding The Last Guardian(another game I forgot about),
Some of the more positives they showed include,Portal 2 is being developed by Valve for the PS3 version,Sly Cooper Collection(3 underrated
platform games,but it would be better to develop Sly 4),GT5 FINALLY has a release date,Killzone 3 will anniliate Gears of War 3.
Third party games that have plenty of interest include;Mafia 2(can't wait for it),Yakuza 4 gets a western release,Arkham Asylum 2,Civ 5,
and the one that has got me excited is a remake of Monkey Island 2.I was expecting Rockstar Games' Agent but with little info and
no mention of KH3 or a more optimistic announcement of Uncharted 3.
What makes you believe KZ3 will annihilate Gears 3? I'm a fan of both series as I own both a PS3 and an Xbox 360, but the Gears series is quite a bit better than Killzone series.