i have not played all the sims out there, started in GTR2 and now AC since it came out - these are some of my ideas (some already mentioned, some not?)
1. Dynamic track linked to dynamic weather including wind effects.
2. Day/night transition effects and light beams
3. Track debris build up ie 'marbles' etc with consequences if you go off line?
4. Pit stop strategy editor prior to starting race (mainly for endurance races)
5. Better endurance racing support ie driver swap (with ai co-driver able to pit using predefined strategy)
6. Ability to save game progress during qualifying and race sessions (sometimes the real world calls - don't want to puke! inside my full face helmet!!)
7.........
8.........
?
1. Dynamic track linked to dynamic weather including wind effects.
2. Day/night transition effects and light beams
3. Track debris build up ie 'marbles' etc with consequences if you go off line?
4. Pit stop strategy editor prior to starting race (mainly for endurance races)
5. Better endurance racing support ie driver swap (with ai co-driver able to pit using predefined strategy)
6. Ability to save game progress during qualifying and race sessions (sometimes the real world calls - don't want to puke! inside my full face helmet!!)
7.........
8.........
?