MGS5 (open world gameplay)
Ryse (looked… amazing.. launch game)
Exclusive Insominac Game (not much shown.. colorful)
Killer Instinct
Project Spark (LBP in 3D)
Quantum Break - short in-game sequence (time freeze)
BF4 (60FPS, exclusive map pack first)
Dead Rising 3 (exclusive, huge world)
Forza 5 (1080p/60FPS) amazing!
Minecraft on XB1 (bigger worlds)
No more points, no friend limits, all in home use gold, 2 monthly games with XBL gold, new editing and video sharing, twitch.tv live streaming
Titanfall (exclusive, COD with Mechs) you guessed it.. amazing.
New Halo next year.. 60 FPS
$499 price.. about the same 360 launched at (after inflation adjustment)