Just to be clear, the "results" that are being released are actually projections based on polls.
When the real polls close, i.e. the actual voting is over, local officials start reporting and tabulating, and the media can report those as soon as local officials release them.
So, what we might see is at 7:02 pm, an announcer come on saying, "NBC News projects that Donald Trump has won the state of Indiana." Then there will be a graphic underneath that showing that with 0.5% of precincts counted, Trump has 37% of the vote and Clinton 60% of the vote.
What that means is that the polls have closed in Indiana, and based on the media's exit polling, and the fact that Indiana darned near always votes Republican, they are confident that Trump will win after all the votes are counted. At the moment, hardly any real votes have been counted, so pay attention to those numbers.