Based on the chart below, I'm not sure how much longer it can last, but for now, under pressure from several directors, including Quentin Tarantino (of course), Christopher Nolan, Judd Apatow, and J.J. Abrams; the studios have all agreed to pre-purchase film stock from Kodak.
Article was in the WSJ, this after Kodak recently emerged from bankruptcy:
http://online.wsj.com/articles/kodak-movie-film-at-deaths-door-gets-a-reprieve-1406674752?tesla=y