If you're a nerd, it's the first question you asked when the clock struck midnight, 2015.

"So where are all the flying cars? And the hoverboards we were promised?"

In the blockbuster film hit "Back to the Future," which came out 30 years ago, and its sequels, this, 2015, is "the future" - the year Marty McFly and Doc Brown zoomed off to visit in their souped-up flying DeLorean.

Indeed the whole premise of the sequel was about all the amazing technology that we would have in the future, today. So how did the team behind the movies do in their predictions?