The crown has to go to machine learning and neural network advancements. This builds on the increase in data and processing capacity, but it's still an amazing advancement over a mere 10 years. One may argue that the actual CS has been around for longer but I don't think that's giving enough credit to recent advancements.

1. classification (Andrew Ng @ YouTube): https://www.wired.com/2012/06/google-x-neural-network/

2. Language Translations (NLP, word2vec): https://www.technologyreview.com/2020/10/19/1010678/facebook....

3. Transfer learning

4. SnapChat's Face Filters and real time ML for AR: https://screenrant.com/snapchat-anime-face-filter-lens-effec...

5. Apple iPhone's neural engine and Face ID