I'm not entirely sure what you are proposing here....
If you are talking about a Center Controller (C1+) controlling all of the airports, down to the ground, that fall under his airspace: This is already what happens on VATSIM. It is called Top-Down services and is one of the reasons you start your training as an S1 in the Delivery/Ground role.
If you are talking about a large center that oversees a vast area of the United States, an area that encompasses several ARTCC's within it: That idea has been discussed by the membership at large and the decision was made to model the FAA's airspace layout in a more realistic fashion. This idea is known as a "Super Center" and the proposal was declined earlier this year.
If neither of these is what you are talking about: Please try to explain it again in a different manner.