This is an interesting video. Interesting because I can almost hear the cogs turning in the heads of the development team as they discuss the differences between the PS4 and PS3 version of Watch Dogs. There's a really cool tension between making sure everyone knows that the PS4 version will look great and making sure that no-one thinks they're buying the stripped back version on current gen consoles.
But the video is also interesting because it provides insight into the design philosophy behind Watch Dogs, one aspect of which I find quite promising. Watch Dogs' environment will be big, but the city in which it is set will also be deep.
One if the reasons I preferred Grand Theft Auto IV to its PS2 predecessors was the depth of the city. I always felt like previous GTA games felt a little dead on the inside, but GTA IV felt vibrant at all levels. It looks like Ubisoft is looking to add depth to the world in which it is set and that plays directly to my open world tastes.