4. 60 FPS is not confirmed.
Shocked? You shouldn't be. GTA 4 is an open world, go anywhere do anything game and because of that keeping a consistent Devil May Cry 4-style 60FPS is nigh on impossible. I'm told Rockstar North is aiming to make the game as smooth as possible, which is good enough for me. From what I've played of the game I suspect the final release will fluctuate around 30FPS, depending on what's going on. In the build I played the cutscenes have a degree of pop-up, too, but expect a more polished final product. I'm not sure about the character models though. As I've said before GTA 4 looks amazing when viewed as a whole, but less impressive on closer inspection of its parts.
3. Rockstar has got rid of all the fantasy vehicles from previous GTA games.
Everyone will have their own view on the rights and wrongs of this move, but at least it's consistent with Rockstar's move towards a more realistic GTA. So out go the aeroplanes, tanks, jetpacks and bicycles. Still in are motorbikes (they control exactly the same as cars except you can do a wheelie by pulling back on the left stick, meaning you can fire weapons while driving them), speed boats, helicopters and, as you'd expect, plenty of cars. There won't be any base-jumping with parachutes either, which we think is a crying shame.