Forms Panel for modern lists and Custom Forms with PowerApps are new Office 365 features. You’ll begin seeing these features in the next few weeks.
This message is associated with Office 365 Roadmap ID 16115.
How does this affect me?
This change makes for a much quicker experience for adding new items, as well as viewing and changing existing items in your list.
We’ll be gradually rolling this out to First Release customers in mid-October, and the roll out will be completed by the end of December.
What do I need to do to prepare for this change?
There is nothing you need to do to prepare for this change. Please click Additional Information to learn more.