This movie is one giant plothole based take on some philosophical issues, that has proved to be hugely influential. Quite original for a Hollywood flick, it is often given more credit than it deserves. The giant plot hole is that using people as batteries makes absolutely no sense. Contrived in its core, it however delivers many themes and is a decent movie, and the influence it has ups its rating a bit. But lets not get over ourselves, this is not Terminator or other such gem, not by any stretch. Still, worth a watch.