The original Orwellian meaning of the title (inspired by George Orwell's book 'Nineteen Eighty-Four') was that the public were being watched by the state. But now it seems not enough members of the public are watching Big Brother to follow this concept through. Therefore the initial format has vanished.
Australia's version of Big Brother has already been axed following a steady decline in ratings. It seems the reality show is finally receiving a reality check.