"IGN Movies has reported that a film adaptation is in the works; whether it is for a movie or a television series is unknown. J. J. Abrams, who has been behind shows such as Lost and Alias, is supposedly attached to produce and direct. Carlton Cuse and Damon Lindelof, also affiliated with Lost and J. J. Abrams, have optioned the Dark Tower series from Stephen King for a reported nineteen dollars, which of course, is the infamous number from the Dark Tower series of novels. According to issue #923 of Entertainment Weekly, King "is an ardent supporter of the desert-island show and trusts Abrams to translate his vision" into a film franchise with Lindelof being "the leading candidate to write the screenplay for the first installment." In April 2009, both Abrams and Lindelof revealed that they would most likely begin adapting the series when Lost concludes in 2010."
I haven't read the books but might watch the movies especially with Abrams being involved.