Technological pessimism underestimates the rate of progress, but technological optimism routinely overestimates it. In the 50s people thought we would have supe

Technological pessimism underestimates the rate of progress, but technological optimism routinely overestimates it. In the 50s people thought we would have superintelligent robots, flying cars, moon colonies and cold fusion by year 2000. In the 60s people were optimistic that we would eradicate all diseases in the near future. Right now some people believe the singularity will happen in the next decade. What could possibly happen in the next century that would be "unimaginable" to them? If you showed today's world to an optimist from a century ago they would see many wondrous things they would never have thought of, but they would also fail to see many of their predicted advancements. And I do think that what optimists predict is usually far more impressive than what actually comes to fruition. That's not to say the pessimists are right, but the optimists simply don't have the track record you seem to think they have.