It could be awesome if there was a air simulation game. Where it's MMO (Massive Multiplayer Online) on some big servers, just like games such as World of Warcraft.
First of you start at flying school, then you get a job as an Air Taxi Pilot, where you fly short destinations and earn some cash, after you gotten certain number of flight times, you unlock the possibility of flying business jets that lets you earn the big money so you can start taking commercial airline certificate. So you can fly for commercial airlines in small aircrafts such as Bombardier Q400 and ATR's and other kinds of small commercial aircrafts.
After that you start flying for experience and flight time, untill you get enough to start flying CRJ's and ERJ's, after that 737's A319's 320's 321's domestic and then 757's, 767's, A318/19/20/21's etc. international flights and in the very end fly intercontinental flights in 747's A330's and all that.
Now that would be awesome! I think i will sell that idea to Microsoft or something