Deep learning, a history in context

DeepMind, based on a deep learning architecture made a big impact in the tech industry. Deep learning continues to gain traction in the machine learning community and in the mainstream, both in terms of public awareness of its capabilities as well as through commercialisation.

This article by Simon Winder provides a very accessible introduction to the topic:
What is deep learning

It goes well with this great TED talk that showcases some recent impressive applications:
TEDx Brussels talk by Jeremy Howard, on the wonderful and terrifying implications of Machine Learning