Dr. Mark Post's 'in-vitro' meat was launched on August 5th at a strange event that was half press conference, half cookery demonstration. Richard Fleischer's Soylent Green (1973) came up in numerous responses to the story. I've written about this rare intersection of high-science, cult film and hamburgers in a piece for Monolith.
Thinking about it now, I guess Post's burger project probably has more similarities with Joe Pantoliano's steak meditation in The Matrix.
If you're hungry for more food related science fiction films, try Critters, The Stuff and, if you can handle it, the horrifying McDonald's fetish that is Mac and Me