If Doc Brown had ever made the original trip 25 years into the future that he was planning at the start of Back to the Future, he might have been quite surprised to find out that a lot of his hometown looks almost the same. Of course, it's actually 27 years later now, but the same fact still applies.
Herve Attia, an apparent superfan of visiting movie shooting locations, has put together quite an amazing look at the various shooting locations used in the first Back to the Future movie, edited in with clips from the movie itself. Then-and-now sites include the town of Hill Valley, which was mostly part of the Universal Studios tour, but also Marty McFly's high school, the Twin/Lone Pines Mall, the Peabody farm, both locations used for Lyon Estates, and Doc Brown's 1955 mansion.
Hell, even the Burger King that Marty skateboarded past in the opening scene and the tree George McFly fell out of are still there. Check it out:
So while we may not have invented flying cars or hoverboards yet, at least we can be rest assured that the Twin/Lone Pines/Whatever-it's-really-called Mall now has a TGI Fridays. Maybe they serve Pepsi Free?