Skype works on all platforms. Office365 is a cross platform system. XBOX is being integrated.
It is pretty nifty to add a phone number to a contact on your Nokia and have it show up on your work computer and your wife's phone within seconds.
My iPhone, iPad and Mac Pro do the same thing. Have since the introduction of iCloud.
Yeah, it's nifty when iPhones and Android phones do it, too.