Hi guys, I just started playing the witcher series a month ago, and I am very excited for the new installment. That said, the disappointment and skepticism in this thread is premature, see this quote from head of CDPR studio, Adam Badowski.
“If we look at RPGs nowadays we find two approaches, one which emphasizes the story but limits the game world and one that builds a vast open-world but hampers and simplifies the story. With the REDengine 3 we combine the positive aspects of both approaches for the first time, creating an open environment with a complex, multi-thread story. Together with believable characters, a captivating tale and a world where players can roam freely without loading times, we will be able to move gaming to a new level with a realistic feel and full player immersion. When working on our previous titles, I didn’t dream that we would achieve something like this. Thanks to the support of all our fans, now we have the possibility to use REDengine 3 and create something many RPG fans dream of.” - said Adam Badowski, head of CD Projekt RED studio.
The gist of what he's saying: they want to combine the awesomeness of open world with the awesomeness of good storytelling.
Here's the article for the quote: http://www.actiontrip.com/news/cd-projekt-shows-its-redengine-3/020113_5