I agree with the not entirely realistic arguments. Jetpacks were fun. Grand Theft Auto will continue to be constantly bashed by people such as Jack Thompson and my French teacher, but I think if you are mature enough to play it then it's okay to play it.
In terms of IV in general, I saw the trailer. (Not the high bandwidth version that took forever to load but a lower quality on Youtube) and it looks pretty cool to me. I don't know why New York City is being the city again - unless they change it around a lot --- because wasn't Liberty City supposed to be (somewhat) of a version of NYC?
Plus, the mayor of New York City doesn't really like it either.