"We didn't sit there saying, "We'd like to do this in the game, but we can't." There's plenty of power in these
I take issue with this, they aren't doing the rpg elements because of how everything is HD and you can't get away with making the characters fatter/bigger and keep the motion capture synched up, as well as it not working in the presence of multiple protagonists. Also, a few other bits aren't in like the property missions and terror...tory? missions which are missed by a lot of people, as pointed out by grums not the actual thing, the concept of it. I can't help but feel these would have added to the game, it pains me to say it as I champion GTA a lot, but I'd wait for next gen for a bit more crammed in.
Also, problems with IV were the framerate and draw distances - always better to increase both with better tech, unless they're got around it (BoGT did have noticably better framerate and dds, they had a blur effect in place and grainy one in IV and LatD) in which case, hats off.
It isn't next gen, but it could be as well, and I'll buy both!