This groundbreaking series (exceptional real film, and sound recordings) from the early 1990's is being promoted now (2017) because a brand new 25-year anniversary series is about to be released on a well known premier pay network and they are trying to reinvigorate old fans and to bring in new ones as the debut of the new series nears.
When the original series first aired in April 1990, the promotion mantra was, "Who killed Laura Palmer?" As a result, most people, myself included, were drawn to the series by that one unanswered question. Consequently for the producers of the series, when that question was answered in December of 1990, a big portion of the audience lost interest, or were confused, since most thought the whole purpose of Twin Peaks was to solve the murder of Laura Palmer, and perhaps that of Teresa Banks (who was mentioned early in the series, and was more prominently featured in the movie "Fire Walk With Me", which was released after the series ended in 1991.)
The series never recovered from this marketing mistake, since most fans, like myself, did not realize at the time that Twin Peaks was originally intended to be an all-in-one "nighttime soap opera" (PG-13 by today's standards) that was to have drama, mystery, horror, comedy, and sci-fi all wrapped up in the stories of the residents of the fictitious town of Twin Peaks, tucked into the NE corner of Washington state (USA) just south of the Canadian border. So in the first 17 of the 30 total episodes aired, few people got invested in any of the stories of other Twin Peaks residents, that were not directly related to the murder of Laura Palmer.
This revolutionary series is a bit dated now, although, as I said at the beginning, the audio and video are exceptional, and they play well on HD and in surround sound. You should watch this if you plan on watching the new Twin Peaks coming out in 2017 just to get the background on some of the characters who will show up in the new series.