Although it's based on a 2005 novel by Kazuo Ishiguro, the concept is cloned (pun very much intended). Just like The Island, this concept was used several years before in 1979's Parts: The Clonus Horror (which made for a great episode of MST3K). Clonus screenwriter Bob Sullivan filed suit against Dreamworks for the obviously ripped-off plot for The Island, reaching an undisclosed settlement. Shall be interesting to see if any legal action resurfaces here.