Cities Under Domes
I wouldn't completely rule an idea like that out.
The Food Pill and the Algae Sandwich
In the centuries to come, something akin to this will be available. However it will be entirely synthetic. So don't hold your breath for any robotic whales.
The Flying Car
There will never be a widespread 'personal use/controllable' flying car. Most people can't drive on land as it is, let alone in the sky.
The Knowledge Pill
They will find a way to trigger some dormant inherent abilities, - perhaps it will be available as a suppository. We already know the world is full of smart arses...
Nuclear Bombs for Demolition and Excavation
They will still be used for such. It all depends on who re-denfines the term 'peaceful usage'
Isn't that what global-warming is supposed to have achieved?
Refer to question above.
The Self-Driving Car
We'll see it happen. In the meantime, I'll just stick to driving on auto-pilot.
This will be common soon enough. I just hope Apple has nothing to do with it. I'd hate having to use an iSeeYou.
The Safe Cigarette
Obvious fail for obvious reasons.