Another great question...
ok i was watching revos again a few days ago and then saw animatrix on sat night, the second reniassance part one a nd two...in revos i and plenty of other probly noticed that the machine breeding grounds place and the big scy scrapes of people is HUGE. in the animatrix the big scyscrapers are also HUGE. so the question comes to mind, i know that there are about 50 billon people on earth but do u think that there are like 2 or 3 other matrixes exactly like each other? like in an online game- servers=all the same just diff people. do u think the machines had to make more "servers" of the matrix because they are making to many people?
just a thought...