Jeff Dean posted part 1 of his reflection of Google Brain’s 2017 achievements. https://research.googleblog.com/2018/01/the-google-brain-team-looking-back-on.html
If you don’t know what Google Brain is you can check out this wiki post. https://en.m.wikipedia.org/wiki/Google_Brain
When you read the post you can see the work is lots and lots of ML. Using the below infrastructure. Well they are probably using some really amazing stuff that Google won’t share for a long time. This is the elite Google Brain team they can get anything they want.
As an example of some of their work Jeff references this text to speech work. https://google.github.io/tacotron/publications/tacotron2/index.html
Check out this graphc that shows where TensorFlow is used.