Watch Dogs 2 is really trying to wash away some of the percieved sins of the last title, by color grading to something more youthful and vibrant. Everything in the marketing has been about colour, counter culture and having fun, things that last game didn't always have.
This new video might be your best look at how the game 'plays' too. It shows Ubisoft going through a demo in which they explore the city of San Francisco and see where it takes them. It shows how you will find side quests, to use of gadgets and of course, the depths of your hacking.
You can take a look at it below: