Skype for Mobile now offers the user an option to share their screen with a caller. This could enable people on a Skype call to share things such as slideshows, webpages, a homescreen and so on. The new function is found in the '...' menu on the mobile version of this app.
https://www.notebookcheck.net/New-Skype-Insider-Preview-build-adds-screen-sharing-on-iOS-and-Android.416989.0.html