http://www.gamesas.com/topic/1463070-the-witcher-3-wild-hunt-discussion-3/.
New juicy details from German magazines Pc Games and Gamestar:
~ 50 hours average playthrough
~ Savegames will dictate which character from the previous games returns
~ Hunt animals for fur and track their colour-coded markings in the wild
~ Npc's alert the guards if they see you stealing
~ World’s economy is dynamic and is affected by what you sell, and how much (Oh...my...)
~ Geralt can even jump now – praise gravity!
~ Geralt has a new combat mechanic that lets him target body parts, which is a bit like VATS in Fallout 3
http://www.vg247.com/2013/02/28/witcher-3-is-50-hours-long-new-previews-offer-fresh-details/
http://www.youtube.com/watch?v=I9X2P85yCh4
http://www.neogaf.com/forum/showpost.php?p=62370631&postcount=29
http://www.youtube.com/watch?v=kDpdajTX4tE
http://www.youtube.com/watch?v=2HGhm0H7d68&feature=youtu.be
http://www.gamespot.com/e3/the-witcher-3-wild-hunt-is-35-times-the-size-of-the-witcher-2-6409854/
http://i43.tinypic.com/9jejhh.jpg
http://gamingbolt.com/the-witcher-3-wild-hunt-interview-ps4-xbox-one-versions-weather-system-monsters-and-dragons
http://forums.cdprojektred.com/threads/513-Full-Combat-Rebalance-Mod-for-The-Witcher-2-is-out!. Keep an eye on it!