This years E3 really does seem to be the best to date. Lots of stuff all round, much more than I am even going to mention in this post.  These are just the things that are my personal favourites.

Sony

• 3D gaming with a demo of the upcoming exclusive, Killzone 3, expected February 2011.
• Move (even though I feel it is a bit gimmicky)
• LittleBigPlanet 2
• PlayStation Plus
• Portal 2, properly done for the PS3 & the trailer looks to have much more physics details

Microsoft

• Kinect – previously Natal.  Lots on this as well, including some titles.
• Gears of War 3
• 360 Slim, built-in wifi & disc-scratching technology

Nintendo

• 3DS – 3D gaming without glasses
• The return of many classic nintendo characters

A wide range of games (non console exclusive) were also there

• Call of Duty: Black Ops
• Mortal Kombat
• Sonic
• Dead Space 2
• F.E.A.R 3
• Medal of Honor
• Quantum Theory
• Crysis 2
• Silent Hill 8