Back in the Windows 7 days I installed Skype on my parents computer before moving abroad, their user experience was basically like receiving a phone call. Even though they weren't tech savvy we never had any issues. I would call them, and if they were home and near the computer, they could answer it and we'd be video chatting. A year or so ago I found this to be impossible, there was no application for desktop that w…
FaceTime is about as seamless an experience as you can get, and it's basically like receiving a phone call because it's indeed a call on a phone!