The Sims 4 System Requirements, are one of the many things simmers want information on, and the always helpful SimGuruGraham has revealed when we can expect to hear about them:
@TheLucaStClair Not until we're closer to launch when performance optimization is finalized.
— Graham Nardone (@SimGuruGraham) February 6, 2014
This answer shouldn’t come as a shock to anyone, but at the very least, it gives players a time frame of when to expect this information. I’ve witnessed an increase of “search hits” to the site about specs, so hopefully this post helps those with this question.