I praise GTA for its atmosphere, but I want to give Watch Dogs 1 its flowers for its commentary on privacy and technology, even if Ubisoft didn't fully commit to it. A high crime city like Chicago regulated by a digital infrastructure where ALL your information is kept/tracked 24/7 isn't far off from science fiction.
The profiler system with the NPCs did give me pause a couple times of whether I would want to hijack their money, kill them or let them be. It gives a better illusion that the NPCs are inhabitants in a gritty city like Chicago with secrets, oddities, and quirks that exist without THEM knowing that you are "the vigilante."