Linked from Reddit
Reading it the biggest things is that we are going to Los Santos this time around. We went there in San Andreas except this time it's rendered to scale to note it's supposedly the size of the entire San Andreas (13.9 miles) + GTAIV Liberty City(7 miles) + Red Dead Redemption which is close to 27 square miles means GTA V has at least 47 square miles of area to explore. That's interesting size wise, but the main thing is the fact is that while it is one city it's the entire city plus all the environments around the city.
Add onto that fact the promised gameplay. What they are talking about sounds like the perfect setup for co-op. You get three main characters, Michael the married "getting to old for this shit" former bank robber, Trevor the psychopath pilot and Franklin the repo man/sniper at least that's how they are roughly described. Gone is GTA IV's friendship quests as instead the best friends of each is the others. As missions go on each main has a role to play and who you play as determines what your goals are. The example breakdown of the escape was great. A helicopter escape turns into a three way choice. You can out fly them as Trevor, try to shoot them down as Michael or have Franklin snipe the the pilots and who you pick determines what your objectives are.
That sounds like the perfect send up to perfect co-op there. Grabbing two friends to do missions, each of us tasked to do something different, not fighting with each other to fulfill objectives but each having our own role.
GTA games are always worth a play, as long as they improve the damn gun combat this looks great.