How real is Inception?

Ever since I read some of the books by Carlos Castaneda, I've been very interested in the study of meaning of dreams. The film inception discusses the power of dreams so I decided to look further into this. The following article discusses the scientific validity of dreams in Inception.http://www.huffingtonpost.com/matthew-edlund-md/dream-sharing-inception_b_652088.html#s116939&title=Is_Time_Altered