DeepCrawl discovered that Google is testing a new GoogleBot that can render the web like a modern Chrome browser.
The following image from DeepCrawl shows what this experimental GoogleBot is able to render, which is above Chrome version 69.
This is what the normal GoogleBot can render, similar to Chrome version 41:
It was confirmed on Twitter by Martin Splitt that this is something that Google is, in fact, testing. According to Martin, “We’re testing things all the time and sometimes these experiments are visible.”