Microsoft has released the Office 365 Public Roadmap which you can access here. This is a great tool to discover what updates are being rolled out, what updates/upgrades are being worked on and what is on the “map” for consideration down the road. The roadmap also gives you a link to see what updates apply to your O365 subscription.
It’s a great look into the inner working s of O365 and kudos to Microsoft for making it available. Things have changed very quickly in O365 over the past 18 months or so and there are more great changes on the way!