That looked freakin awesome. I hope we can do some of those things with friends like crashing trains or driving a car out of a plane but I doubt it as those looked scripted. Still looks fantastic. I'm already eagerly anticipating the next video/trailer.
Seriously, people who are not impressed by a game of this size looking this good have some pretty unrealistic standards. The game looks fantastic, and it is bigger than RDR and San Andreas combined. Hell, we can even explore the ocean floor this time.