(probably more literally, the soul is obliterated, not kept conscious... i.e. "fear not man who can only destroy the body, but fear God who can destroy both body and soul").
Additionally, I don't think everyone is going to Hell as you claim. I think (key word is "think") that everyone is going to Sheol, which is a temporary holding place of the dead. On judgement day, everyone will be awakened from their sleep in Sheol and judged. After this judgement, I have no idea what happens because it is a gray area in scripture.