All I have seen is Microsoft presentation, but that is all I care about. Honestly, my jaw dropped with Halo 4 when the enemy is revealed as the forerunners (<3), then I got more excited with the multi player segment where you can lunge and slit someones throat.
Then I saw they are using kinect to its fullest, splinter cell voice commands (<33) and then Madden 13 with voice commands, which is going to be amazing. I got a little teary with excitement as that is what I always wanted with those games, on the fly audible, design plays again, just everything is yes.
Then smartglass was talked about. With all the upgrades, I won't need a computer anymore since I will be able to do everything via xbox. Also with basically an announcement of Windows 8 by the end of the year, I'm pumped.
But yeah, microsoft fanboyism.