Where is my Jetpack?

The science of futuristic sci-fi is amazing, but no where do we see the teleporters, flying taxis, replicators, androids, floating cities? The future ain't what it used to be, in fact, it seems so blah and boring.

There was once hope of everybody with a jetpack on their back, and a sky full of flying cars. A world where the "miracle" of a replicator is a common as a xerox machine in our own world. Sadly, this is not so, and yet we still dream of one day a voyage beyond the stars.