This may already be on the horizon but I would love to see the ability to copy and paste controls and layouts between apps.
For example:
If I build a screen with all of it's layout, buttons, fields, etc. I'd like to be able to easily copy it from 1 app into another.
This would allow for multiple people working on a project but not in the same live file at the same time.
Excited that this feature is now complete! You can now copy and paste across apps using Ctrl+C to copy and Ctrl+V to paste.
Read more here:
https://powerapps.microsoft.com/blog/copy-and-paste-controls-across-canvas-apps-available/