Back in my (much) younger days, I had some firm ideas about what the future would hold, so no one is more surprised than I am that we're still not using jetpacks to get around. If, like me, you were slightly obsessed with the future, you might be interested in checking out the 1972 children's book 2010: Living in the Future in all its online glory.
Written by Geoffrey Hoyle, 2010: Living in the Future gets some things right (people will live in smaller, carefully planned homes that will be networked by powerful computers) and other things hilariously not-so-right (um, climate-controlled jumpsuits?). Either way, it's a fun read and an interesting avenue for talking with your kids about the past and the future.
See the book (now out of print) in its entirety here.