Newton and Einstein solved the main problem of nature, but it will take longer than we expect to solve the problem of mind.
GAN is a technique for representation learning, which is a subset of deep learning, which is a subset of machine learning, and which is a subset of artificial intelligence.
As two of the most popular fields in this era of deep learning,
Computer Vision is our observation of the external world,
and Natural Language Processing is our internal representation of either the real or imagined world. To me they are fundamental components to solve the problem of mind.