Are most movies still shot on 35mm film? - Yahoo! Answers
According to that question posted 8 months ago, film makers are still using film... albeit large format for HD.
the migration to digital has been slow afaik... since 2005 the majority of movies were shot using film... but digital use has been slowly increasing..
of course, film projection is still in use as well - upgrading equipment to use digital projectors and such is costly when you've already got good analog equipment at hand...
as a side note, some cinemas in asia have been known to use PS3's to show blu-ray film - haha
as for your question regarding computer imagery - yes.. they process the film and scan it into their systems... then they're reprinted onto film rolls..
it might sound inefficient but its been an industry standard for decades now... no need to fix what aint broke :P