Personally I like the Conference and everything they did. Microsoft has taken their time with the development of Kinect, and I for one, think that it will pay off. I thought that Kinect support for Mass Effect 3, Future Soldier, and Fable: The Journey are refreshing from the games we are used to seeing. I for one will be playing future soldier on both Kinect and a Controller, it might be fun in different ways on both. Microsoft is trying to catch up (of sorts) with the extras that were seen with the ps3 when it launched. Personally I don't see it as a bad thing, because they are now bringing in newer gamers, younger gamers, etc. This might not be new to us, but its new to them and new to the 360.
Lets get to the meat of the conference (in my opinion). Gears of War and Modern Warfare. Sure most of us played a Gears of War game, and we know what to expect from the third title. I for one enjoyed the classic Unreal feel of the demo shown. To be specific, I mean the silverback mechs. In previous Unreal games, there have be a variety of vehicles you could use. Gears of War however, limited you to driving levels, escorts, and ride alongs. The silverbacks are an interesting twist to the core gameplay. They provide higher firepower, and mobile cover! Of course theres always giant bossfights to look forward to

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Modern Warfare 3......oh mw3, why you so crazy? The direct sequel to Modern Warfare 2 (of course lol) will have you defending New York after the events of MW2. Since we haven't seen any multiplayer footage, I will point out a few things I saw from single player footage.
Weapons: Besides the occasional M4, I saw a MP-5 with a new style to it. The grip of the weapon seemed to be missing, not sure of that was on purpose or whatever. I did notice the reload animation was from the mp5k of mw2, however that isn't a problem. A few weapons I saw in action were the AT-4, AK-47 (redesigned as well), P90, Ak-74u (used the cod4 pickup weapon sprite), Spas-12, and the g18. Personally I don't like most of the weapons shown in action, but oh well.
Gameplay From what I saw, it looks almost exactly like Modern Warfare 2, but thats not necessarily a bad thing. The campaign of mw2 was fun and very action packed. To simplify what I mean, if its not broken, why fix it? I just wonder what tricks will be used to make sure MW3 runs well on the 360, with all of the explosions, smoke, and gunfighting going on. We should see when its released.
Crud I forgot about Halo. The Teaser for Halo 4 doesn't show much, unless you didn't finish Halo 3 on Legendary difficulty. In this case, since I'm not sure who has or hasn't, I'm not gonna say anything about it. I will talk briefly about Halo CE: Anniversary. Its been 10 years, 10 long years. Many things have changed in the industry, but one thing is for certain: Without Halo: CE, there would be no Xbox 360. It seems that the industry thought that it should have a facelift, but keep its original gameplay (at least for campaign). I will be getting the game first day for sure. I haven't touched CE in what feels like years, so this will be an enjoyable trip to the past. Plus its using a layered version of the original CE engine that we saw on the original Xbox, so if you really want to play it the old way, just press a button and presto lol.