The latest news about CBS's new Star Trek series Discovery says the show will be set ten years before the events of the original Star Trek adventures with Captain Kirk and the Enterprise. Like the J.J. Abrams movie trilogy and the most recent Trek series Enterprise, Discovery will be a return to the origins of the franchise. This is a departure from the 1987-2001 period, when Next Generation, Deep Space Nine, and Voyager drove the story forward into the 24th century. For the past 15 years, Trek has been stuck in the past of the franchise itself. What do we gain by endlessly returning to the origins of this interstellar tale?
Obviously, we get to go back to a fan favorite period of adventure and strife. Back in the crazy days of the 23rd century, humanity didn't have replicators or positronic brains, and there was no peace with the Klingon Empire. That affords more opportunities for the kinds of problems that make for good drama. This period also offers narrative comfort food for fans, reminding them of the "good old days" of the show before everybody got so uptight about the Prime Directive and started worrying about post-colonial politics on Bajor and other developing worlds.
Teaser trailer for Star Trek: Discovery
24th century Trek
As Manu Saadia points out in his excellent book Trekonomics, there's a huge gulf between the civilization of TOS and TNG for one reason: the replicator. As a result of this one piece of technology, humans can basically turn energy into matter (with a few exceptions, like the dilithium crystals needed for warp drive and the valuable material latinum). The replicator means pretty much all problems with scarcity are technically solved. Nobody needs to work for a living, because all our material needs can be met as fast as you can say "tea, Earl Grey, hot." Work itself as a concept is radically transformed. People only work because they choose to work; everyone enjoys (or at least gets satisfaction from) their job.