According to one lab owner in 2007, it seems as if film sales by 2007 had declined about 75% since the peak in 1999,and decreased 20 to 30 percent annually over four consecutive years.
Film Sales Statistics - How Much Has Digital Cameras Affected Film Sales? - Yahoo! Answers
According to the New York Times
http://www.nytimes.com/2007/10/09/business/09film.html?ref=business
In this article, a senior FujiFilm official told the Times that 800 million rolls of film were sold in 1999, the peak of film usage. In 2006 however, only 204 million rolls of film were sold. And the article also states, "The Eastman Kodak Companys film business has plummeted, and the company has spent the last few years making a transition to digital technology."
Any talk about film making a "comeback",etc. is wishful thinking. Numerous film and darkroom products have been discontinued. Kodak itself has stopped making all film cameras. Not a single,significant film camera has been released over the past four years. Film is fun to work with,and a wonderful way to capture images, but it is clear that the vast majority of images are being captured using digital technology. I think film will be around for quite some time, just like cassette tapes were available or many years, well after the capture medium had lost favor to digitally captured sound.