Wowbagger
The Infinitely Prolonged
The Internet.
Where's my personal flying car?
Sure, there's no flying cars. But seriously, you'd think that in 2011 you'd have toothpaste that didn't ruin the taste of OJ.

The other is TV shows where people compete for money in degrading semi-gladiatorial contests. Common in 1970's SF, and totally farfetched then. Of course, reality (pun intended) turned out a lot less lethal than portrayed back then, but still no one in his right (or even wrong) mind would have imagined 30 years ago the otherwise very peaceful and safety-minded society revel in people humiliating themselves.
Anythng else come to mind?
Firemen don't burn books. It is interesting that printed work has been in decline and it's value has decreased. Sad really.
The Internet.
I think Blade Runner's setting was less than a decade in the future, and it's pretty clear that Los Angeles won't be crawling with replicants by then.
One of the best jokes in Stargate : SG1 is the way that hurling lumps of high-speed metal at a target by means of a simple chemical reaction is a seriously hoopy idea to more "advanced" cultures.
A bullet is an energy weapon which can disrupt all manner of things, and letting them off is a blast. What more can you ask for?
Dick Tracy - 2-way wrist TV. TV, not radio.
Dick Tracy - 2-way wrist TV. TV, not radio.
So, one guy got parts of it right.See The Shockwave Rider by John Brunner.
The biggest mistake any science fiction author can make is putting an actual date on the setting of his story, unless it's at least a thousand years in the future. For people with such incredible imagination and vision, so many of them who wrote in the 50s and 60s seemed to think that the 90s and 00s were in the unforeseeable future.
As for meals in pill form, Wired had an article that explained that the required amount of protein, fat, and carbohydrates that a human needs each day still requires a certain mass of actual substance, no matter how concentrated. You just can't compress an entire meal into a pill. There is just no way around it.
Asimov said that one of the things sci-fi "got wrong" was computers. He had envisioned huge, centralized machines with a large number of remote public-access "nodes" where one could ask questions and such.
The notion that everyone would have their own (or several!) was pretty unlikely.
My favorite science fiction work is Anticipations by H.G. Wells. Written in 1902, he predicts:
The rise of the automobile as a common means of transport
The freeway system (and the asphalt that made building them affordable)
Suburbs
Tract houses
globalization
increasingly socialist governments
None of which seems science fictiony to us, except that this was written more than a century ago, and derived with straightforward logic. Suburbs, for example, were an obvious consequence of the faster travel granted by freeways and cars, combined with a maximum commute time of two hours, the limit of human endurance even back then.
NSFW lyrics
Sure, there's no flying cars. But seriously, you'd think that in 2011 you'd have toothpaste that didn't ruin the taste of OJ.
I've sometimes wondered if Colossus would have crashed on the year 2000.I was startled, recently, to watch the 1970 film Colossus: The Forbin Project, which depicted what was intended to be a futuristic megacomputer system. There were clear depictions of recognizable technology that, by now, have been obsolete for a very long time. Punch cards, teletype terminals, nixie tubes, open real magnetic tape, and so on. And, of course, the big panels of blinking lights. That's what computers were like in 1970, and that's how they imagined computers would be in the foreseeable future; only bigger.