MM, there was a sim style game that tried going hyper realistic years ago and it just didn't have the same charm. I really, really like the artistic style they took with 4. It feels more natural having these cartoony (but still very detailed and beautiful) characters with the kinds of interactions that the sims have.
I'll admit that I do like very realistic looking graphics, but it has to fit the game. Uncharted 4, the new Tomb Raiders... they have gorgeously realistic models and it works because of the setting and how the characters act. It wouldn't sit well for me in a sims game where we have hundreds of quirky interactions and impossible scenarios.