I can’t see why any other browser would consider supporting Topics. Google wants to keep tracking users across the entire web in a world where users realize they don’t want to be tracked. Why help Google?
Google sees Chrome as a way to embed the entire web into an iframe on Google.com.
A slot machine for speculation. Enter a topic and get a near-future scenario on that topic generated automatically.
An interesting way of navigating through a massive amount of archival imagery from NASA.