"This thing means I don't have to carry a phone anymore." An iPad 2 with Skype is a far less expensive way to stay in touch than an international cell phone.
This is interesting because Skype, effectively the global VoIP standard, is now owned by Microsoft.
In light of what happened with Office and Mac in the '90s, Apple is probably doing their best to avoid a situation where a Microsoft product becomes perceived as a crucial part of their platform's value proposition... IOW, Apple certainly doesn't want people to actively think of iPad + Skype as a killer combo because they don't control the other half.
But what can they do? FaceTime has no chance of catching up with Skype in global adoption. And considering the iPhone/Android squabbles, it's unlikely that Apple would turn to Google for help against Skype. Hmm.