Walther posted this video of .45 PPQ
https://www.youtube.com/watch?v=RZFehir4lFc
According to Guns.com, slide is longer and thicker than 9mm version. It also weighs 1/4 pound more. It carries 12 rounds, and will be available in October.
MSRP is going to be $699
From: Walther via Guns.com