GoW achieved graphics ahead of it's time on PS2 and is one of the best looking games on PS3. Having set-cameras helped in getting maximum quality because areas that didnt have a camera on them could have lower quality and nobody would see. This allowed them to focus on the areas that DID have cameras on them and make those the best the possibly could.
Now with PS4, they have alot more power. and people are tired of the same old same old GOW. They should make God of War a more open world game. Instead of following linear corridors and fighting in small-box arenas, they need to give us a whole world to explore. It doesnt have to be GTA size, but maybe similar to Arkhan City or a Zelda sized world.
This is the only way to take GOW to the next level and keep this franchise fresh.