Society Jay Leno exits. Jimmy Fallon succeeds, or not. Late-night lives on. (+video)

The late-night landscape is fragmented. Hosts rise and fall. But late-night programming has a solid niche in popular culture. Millions tuned in to watch Jay Leno's farewell to 'The Tonight Show' this week.

By , Staff writer

Jordan Strauss/Invision/AP/File

As Jay Leno prepares for his final "Tonight Show" monologue, the overall ratings for the venerable NBC show are a fraction of what they were in 1992, when he took over from Johnny Carson.