You can take almost any deep learning task that we had 5 years ago, and we can train the same task about 1000x cheaper because of hardware improvements that are

You can take almost any deep learning task that we had 5 years ago, and we can train the same task about 1000x cheaper because of hardware improvements that are slowing down, and algorithmic improvements that don't seem to be slowing down. Jeff Dean had an overview article about it I think. Also many people forget that we have working self driving cars on the road, 20 years ago nobody thought that it would happen so fast.