Google skipped Version 82 due to COVID-19 thus Version 83 is next up.
Chrome Unboxed 
has a summary of what is coming with Version 83.
Several new features are only available by enabling flags, including tab groups, the new terminal, and previewing the new Files app. About Chromebooks
I now have Version 83 on my Google Pixelbook but I have not yet enabled any of the flagged features.
First, I enabled Tabbed groups in Chrome, and I am not seeing the value. When I close a group and re-open, not all of the tabs I assigned appear. There doesn't appear to be a way to collapse. The groups don't persist between shutdowns, so I don't really see the point.
I enabled the new terminal, which provides multi-terminal tabs that I find very useful. In my opinion this one feature alone makes Version 83 worth the update.
Virtual desktops now persist between reboots but the contents do not, thus the value of persisting the desktops is unclear.