Some of the new features are:

• Files app now seems to work across local files and those on Google Drive
• Search filters (local or everywhere, time, & and type)
• "Enhanced autocorrect"
• OCR for PDFs (wasn't able to get working - unsure why)
• RGB Keyboard Backlight Control
• Updates to the setup wizard

Seems like the only one I would use is the OCR one but I haven't been able to get it working. Maybe it's an accessibility option?