There was a Tekken 7 listing was spotted on Amazon UK which listed both Playstation 4 and Xbox One versions of the game as well as a PC version. If the listing is correct, then this will be the first Tekken game that lands on PC.
This could possibly be what Tekken Executive Producer and Game Director Katsuhiro Harada mean’t when he said this:
Not only is Unreal Engine 4 powerful and easy to use, but it allows us to immediately bring TEKKEN 7 to any platform we desire.
Bandai Namco is planning to provide more information on Tekken 7 later this week at San Diego Comic-Con.
Sadly the original link is down and gives you a 404 error when trying to access the Amazon page.