Go to youtube and type in 'Skyrim E3 Demo' and look for videos that are about 7 to 11 mins.
The game is going to be amazing (PREORDERED=D)
Although they have taken out a lot of things for example an armor set is composed of: Helmet,boots,gloves and the centerpiece. unlike in oblivion where it was boots, helmet, greaves, cuirrass, gloves, or even morrowind where you had pauldrons as well. this might upset most people and it took out a lot of customization.
Game is said to be about 300 hours long like oblivion and Morrowind.
Horses and Fast travel will be available
More small towns and larger cities.
Smarter AI with better quest dynamics.
Jobs - blacksmithing, woodcutting, etc.
Skills are more dynamic via Blacksmithing you actually hit stuff with hammer, Enchanting you actually infuse magic with item etc.
Dragons are random and attack on sight and have no limit cap.
Some creatures are friendly, neutral, hostile.
Better graphics, destructible environment.
Quest character replaceable.