That seems like a pretty high number when you consider the exponential rate of technological advancement.
1000 years in the future is probably going to be completely unrecognizable to us given the current rate of change in society/tech.
I wouldn't dare to make prediction about mankind 1000 years from now based on a relatively short time window of technological growth. There are many huge obstacles in the way.
1000 years from now will certainly be even stranger to us.
All our Darwinian ancestors never had the capacity for intellectual fear of their superior successors...
Hopefully we as a species can get beyond our fear.
Sure, the human race is unlikely to die out unless we get to mass-exinction levels of climate change, but our civilisation is a lot more fragile.
It should be obvious why a superior intelligence is something dangerous.