Should phone numbers be clickable within our software on (desktop)?

We are working on cleaning up our system and identifying phone numbers so they will be detected and show up as links for mobile users.

The question I have is should we make them show up as links for desktop users as well? I can't really think of any cons that would come from making them clickable on desktop. Only positives, such as users who might use Skype or any other kind of app on their desktop to make calls.

Am I missing something. Are there any cons to showing phone numbers as links for desktop users?

For a Desktop User Which is best? :