-Apparently you can switch between characters on the fly, all three will be doing missions together
-Fully detailed ocean floor, military base, sprawling suburbs, wine country, wilderness, fully explorable Mt Chiliad, Salton Sea type region....
-Dan Houser on shooting: We feel like we've evolved it on from where we had it in any previous game a long way. And not just in terms of how it works, but also in terms of the core mechanics of how you play the game.
-Melee: It's better than we've had in the past. How far we can push it -- we will see depending on resources we allocate to it.
-Yoga, base jumping, triathlons, tennis, fully golf course, scuba diving....
-"Los Santos is bigger than RDR, GTA IV and San Andreas combined."
For the last point, they could refer to vertically as well, maybe explorable buildings/sky scrapers?