I have about 600 hours pilot time in single engine aircraft, having got my license in the late 70's. While flight sims are fun, you could have a million hours in Microsoft Flight Sim, get in a real aircraft, and take off and you will crash rather than land. I had occasion about 3 weeks ago to talk to a real railroad engineer at a railway museum in the Atlanta Area. He even invited me into the Cab of the Diesel that he operates on the weekends for the museum, and showed me around and we talked for about 45 minutes. . I told him that I had become interested in Train sims, and had started with Trainz ( which he knew and liked).
He then said, " The one problem with all the train sims, is that you don't get the real feel of actually driving a train, from a sim". This is the same thing in flight sims, and that is why "Full Motion Simulators" that the airlines use for their training, at the cost of about $20+ million dollars a sim, are utilized to train airline pilots on many of the more current aircraft. I have about 6 hours in a Level D Full Motion sim at the Delta Training center in Atlanta, about 11 years ago, and it is like flying the real thing. When you take off and are climbing out after rotation, you actually get pushed back into your seat. If you abort the takeoff, it will throw you against you seatbelts, and if you don't have your seatbelts on, you will probably be catapulted forward into the instrument panel. It is exactly like the real thing, and when a Pilot is trained on one of these simulators, and checked out , he gets one check ride in a real aircraft after that, and then he is on his own with passengers. So the sim, duplicates reality as far as the airlines, the FAA, The NTSB, and the pilot is concerned.
There is no PC sim, now, or in the future, that will ever be able to do that.