Along with Carl Sagan, we can credit Stephen Hawking with de-mystifying the Universe. We've been fortunate to have two such men in our time with the gift of translating Physics into a format we don't need a degree to comprehend.
You will find yourself in awe of Hawking's mind, and justifiably so. It would be truly remarkable if we could find a way to venture into his brain and feel the pleasure he takes in what so many of us find abstract.
The biography of this remarkable man is just as interesting as his research. Told in documentary fashion through interviews with family and friends, we see his development from a precocious child to a mischievous youth to remarkable adult. Also, we have the chance to meet Mr. Hawking himself, who is very personable with quite a sense of humor.
I strongly recommend reading the book A Brief History of Time to accompany the film...it picks up where the film leaves off regarding the sciences, and is less biographical, except for his brief summaries of such luminaries as Newton and Galileo.