Today Microsoft announced the next step for PowerApps integration with SharePoint – using PowerApps forms within the context of a SharePoint list or library.
This is another way PowerApps is becoming a strong successor to InfoPath forms and will give your users a rich viewing, creating, and editing experience right within their SharePoint library or list.
This feature will be coming to SharePoint Online & Office 365 this Summer and I expect we will immediately start using the functionality within my client organizations to improve the user experience.
I highly recommend watching the new Microsoft Mechanics video “Zero code business process apps in SharePoint with PowerApps and Microsoft Flow” to get an idea on how the forms will be created and used.