When I was a child:
Once I’ve talked with my school teacher about the future. I’ve said “Everybody will have his own TV channel.” If I remember truthfully, then she asked “And what will they show?” and I replied “Mainly cats”. This is the correctly predicted truth about YouTube.
As I remember the teacher gave me a bad mark in the school journal “for talking nonsense”.
However I did also some wrong predictions:
In start of 90th when Eltzin and Yegor Gaidar started their reforms I expected that Russian economy will fall completely and people will die of hunger. This has not happened. I repeatedly pledged my mom to purchase me a good computer to gain the programming training and work (in order not to die of hunger). Note that I didn’t blame Eltzin and Gaidar for supposed hunger, but considered it an inevitable outcome of the history.
Victor Porton's Blog 