I mentioned this in another comment but two notable applied applications would be AlphaFold [1] (greatly outscoring SOTA on major protein folding problem), and their data center efficiency [2] which has reducing their data centre cooling bill by 40%. I expect to see many more applications in the coming years as the algorithms get to a more useful point. I think (as does Demis Hassabis) there are going to nearly endless applications in biosciences, weather prediction, material design, and much much more.
[1] https://deepmind.com/blog/alphafold/ [2] https://deepmind.com/blog/deepmind-ai-reduces-google-data-ce...