Sims is ambitious for many reasons, but one thing just scared the living Hell outta me a few months back. As it is said in the article, the roleplaying aspect is massive in the game, and I would imagine, at first many people try to recreate themselves, or an idealized version of themselves in Sims. With the earlier Sims games, there was only so much you could do to make your Sim resemble you, but with The Sims 3, it's the wrong end of Uncanny Valley. Of course the graphics are not photo-realistic, but you can create a surrogate character that at least people can recognize "it's you". That raises lots of interesting, fun, and utterly terrifying possibilities.
Ever since the last game, I had aging turned off via cheat, I always stayed in the Adult stage. There was just so little time to accomplish anything in the game before the character got too old and died, and I wanted to explore every nook and cranny of the game with my character in it's full glory, max out all skills, jobs etc. Then a few months back, I decided to play the game as it was intended to be played, no cheats or tricks. I turned on aging and created my character as usual, who I fine-tuned to the point he looked and behaved like me as closely as the game would allow. I played like any other Sims game, got a nice house, got a job, girl, the life of my character was on track, and was getting close to reaching his lifetime goal. Then a small tip box popped up, saying that my Sim is aging and will become Old soon. Then in a blaze of stars and whatnot, my Sim turned into the last stage of Sim life, being and elder. And that terrified me to no end. Grey hair, crooked posture, trembling voice... and that's when I realized: he will never reach his lifetime goal now, there is no time.
I looked at the character, looking almost exactly like me, turning into a grey, crooked, wrinkled old man, and then something broke inside me. My own mortality, embodied by a bunch of colored pixels on a screen. That's when I realized, there is no cheat that can make me any younger. My character never reached his lifetime goal, he died trying desperately to reach it. I decided I cannot let that happen to me, I only live once...
So The Sims can do much more than just allow roleplaying, it can even carry on to the real life, and that scares the cr*p outta me...