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Happening sometime in 2015. Still my favourite all-around talk show host even if it's felt like he's been phoning it in at times in recent years.
I don't agree with Andy Inhatko's assessment of Jimmy Fallon, but his write up on who he prefers to watch in late night TV is spot on with regards to Letterman. He wrote it a week ago but maybe he sensed (or knew?) something was happening:
I concede that this kind of traditional desk-and-chair show is old-fashioned and I doubt that the concept will survive long after Dave chooses to retire. But night after night, Dave delivers the goods and proves why this time-worn format is a killer with the right person behind the desk.