The bad urban legend and the similarity to Caveman Science Fiction are both bad signs regarding the movie's overall quality, although moviemakers are perfectly capable of making a cliched movie with quality cinematography and acting. On the other hand, the subject matter is interesting, and I enjoy movies/books with awesomely powered up characters for much the same reason I and others enjoy movies with big explosions. In a nutshell: it's probably a guilty pleasure, but I'd watch it.
Limitless is a movie coming out this Friday which includes nootropics as a major plot device. I think that the way they are portrayed in the movie, and the subsequent media discussion (if any) about nootropics would be of interest here, even if the movie isn't.
From what I can tell, the movie is about a guy who uses a drug to improve his mental capabilities, uses those to radically alter his life, who is then targeted because its just that genre of movie.
Just a heads up, if anyone is interested.