I can see why this episode was picked as the opener for the new series. It had all the elements that mirrored the original 1950s series: plot concerning morals, story that keeps you guessing, and not one but two great TWISTS to the ending--what Arcadia was & how the older sister is no longer the bad seed by trying to protect her younger sister but it turns out the younger sister is really the bad seed, run by jealousy & prejudice by turning in her sister since she "always ruins everything" and being the golden child in her parents eyes. I literally had goose bumps when I saw what was written on the "Arcadia" truck and the expression on the younger sister as they are planting the tree.
To clarify a few things from the previous reviewer--in the Twilight Zone, nothing is as of the real world. Many of the original 1950's stories dealt with people with traits not of the norm. You can't analyze an episode as if it was a drama like CSI. Think about it--there would be no gated community like Evergreen where problem children are turned into fertilizer for a tree planted in their memory. It just wouldn't happen. But then again, stories like Evergreen are what sets the Twilight Zone apart from most TV shows.
Also, the marbles used in the voting was how things were done in earlier days--I guess a reference to the traditional values cherished by this gated community. Notice how the marbles are black & white--black marbles were used as a negative voting measure--hence the term "BLACKBALLING" as stated from the Miriam-Webster Dictionary:
1)to vote against; especially : to exclude from membership by casting a negative vote
2)to exclude socially : OSTRACIZE b : BOYCOTT)
Again--one shouldn't look to Twilight Zone episodes for fact--but for great writing that will leave you on the edge of your seat.