I may be wrong, but it seemed to me that this billionaire donated a park in 1989, and a group of friends or random people rented some building that is in the park in order to experience one of the simulations that the billionaire had written. Each person got to choose a character and once the simulation begins, the person's real life memories are blocked and they get to experience the entire life of the character they chose. The simulation ends and they walk out into the park while their reality begins coming back to them. I think that Luther's wife could have just been one of the simulated characters as well as the others who did not show up at the end. The billionaire Mr. Hargreeves seemed to also be a simulated character. It seemed like a good ending to me, if they had ended the show this way. Allison probably worked at the park and it was her job on that particular evening anyway to press the button to end the simulation. She then leaves for home while it takes several minutes for the others to wake up and walk out into the park. Her real daughter Clair and her real life husband are happy to see her as they are every time she comes home from work. I thought it to be a cool ending. Some of the people that rented the simulation may have enjoyed it while others thought Hargreeves to be an ass hole for putting them through something that they assumed would be an entertaining experience.
