My brother and I like to gripe we can't have flying cars, neither, but then we remember that already-draconian driving rules would just swallow people whole ... and can you seriously trust people with 3-D driving? I can't. *shudders*
Though I have heard we're getting the shoes that tie themselves, so I guess there's progress after all, LOL.
The funny thing is, you could watch old Popular Mechanics clips, Jetsons, Lost in Space, etc, and be completely depressed that a lot of that cool stuff never really happened.