Major Features

Realism

Snow falls realistic with the wind (posibly gathers on the ground)

tree branches now have weight added to them and will move with the wind and you

water flows with the wind and downstream

you can now see much further

Character

10 races (presumbly same as morrowind and oblivion)

there are now 18 skills instead of 21

perks are added and there is over 180 of them

there is no longer a HUD

there is level scaling but it has changed (example i walk into a cave and all enimies are scaled but they stay that level forever)

agility, endurance, intelligence, personality, stength, willpower and luck have been removed and replaced with heath, fatigue and magicka

smithing and enchating skills have been added

better character creation you can now change body size or add beards and more

Travel

Athlectics and acrobatics have been removed

you now move backwards much more slowly

there is fast travel

there is sprint

magic

mysticism has been removed

you must have a free hand to cast spells

you can alocate two spells to each hand to create a stronger versions (mixing spells may be possible)

dragon shouts are gained by learning there language to construct sentences

once you kill a dragon you can adsorb their soul but what they do is currently unknown

combat

you can now allocate a spell or weapon to each hand

finishing moves have been added

bows will be slower but more powerfull

new combat mechanics

World

there is 5 major citys (surrounded by walls)

farming, cooking, woodcutting, blacksmithing and mining are available as jobs

the dungeons caves etc are now designed by a team of8 instead of one person

Quests

randomly generated quests that searchs for caves and dungeons that you havent been to yet and adds stuff

Interaction

when you enter chat it longers frezes time

if you drop a sword in town someone might pick it up and give it to you or a fight might break out between men over who gets it or if the nps hates you enogh he'll pick it up and use it to attack you

there will be kids

i believe they also confirmed a buggy system for transportation.

Do you mean the carriages...

No HUD hasn't been confirmed, customizable bodysize neither.

Dragon Shouts can be learnt from walls in caves, not by absording their soul.

thanks i got the information from about 5 different sources and it tends to get mixed up

ill change it right away

There is already a compendium on Skyrim, although your efforts are much appreciated.

Here's a link:

http://www.gamesas.com/index.php?/topic/1181505-skyrim-info-compendium-and-faq/page__hl__compendium

thanks for the link

ps.thats the most detailed one yet