Microsoft Windows 10 for PC and Phone will come with built in Skype service. The popular VoIP service will be integrated into Microsoft’s release, thus making it more of a Windows 10 feature than an additional app.
The new app will sync contact book with your phone and your email. On your Windows 10 running PC, the app will be available on your Taskbar for easier access. To send SMS to other devices directly you can make use of Skype credit.
Other features of the app like ability to send Skype to Skype messages over internet and Skype to Skype to voice calls will be the main features of the app. More information about the same is expected to be revealed soon.