Practical?
If you want heads-up display and big TV why bother having a physical object on 3R track. Suggest you buy Trainz computer simulator, it will require less maintenance, take-up less room and save you tons of money.
Just can't resist.....
Virtual World and Physical World - "Never the Twain (Train?) shall meet".
BTW it is a corny pun, and yes each day as the OP suggested it actually is becoming more intertwined. Thank God I'm an old man and won't live to see it's full implementation. I like driving my own car, rather than it taking me for a ride. Yes I mean multiple senses of "taking me for a ride".