I guess it's never too late. Too bad it didn't come out when the movie did, they would have had outstanding sales. I really wanted one when I was a kid. These days kids haven't seen the movie nor do they know about the hover board. I do think it will get a lot of sales because it's cool and new. Kids will love it.
Mattel announced their plans to release a version of the iconic hover board at the 2012 Toy Fair in New York but offered a few details. The board will be a 1:1 replica of the one shown in the movie, complete with little details like the hole from where Marty pulled out the handlebars when he first grabbed it. Of course the hover board won't actually float off the ground, but it will be able to glide over most surfaces - similar to FunSlides Carpet Skates - and make different movie-like "whooshing" sounds. And of course, like in the movie, this hover board doesn't work on water.
See full article: http://www.gizmag.com/mattel-back-to-the-future-hover-board/21481/