Microsoft will release the first public version of Internet Explorer 11 on June 26th alongside the release of Windows 8,1 Preview with a new "Click to Call" feature that could make it easier to make phone calls via Skype.
According to a leaked document, When you will use Internet Explorer 11, phone numbers within webpages appear as links and open a dialing app when you will click on them. Skype already installs an extension for this type of functionality but with IE11, you won't need to install that add-on.
Screenshot of the leaked document:
Source: Leaked documents