What 'Back to the Future II' got right about 2015

In the blockbuster hit movie 'Back to the Future: Part II,' 2015 is 'the future' that Marty McFly and Doc Brown fly to in their souped-up DeLorean. It is the first time we see a glimpse of hoverboards, dog walking drones, and shoelaces that tie themselves. So what did they get right and what did they get wrong?