Having a worldwide network of telescopes will mean there will always be a telescope available for time-critical events.
Science collaborations exist with a large number of groups including PTF, Pan-STARRS, LSST, Kepler, Super-WASP, RoboNet, CoRoT, HATNet, TAOS, SNLS, SDSS-II, MENeaCS, and the La Silla SN Search.