"Always On" frightens me. Receiving a Skype call these days involves answering it on my laptop, then finding and silencing all my iPads and other mobile devices that continue to ring at me obnoxiously. "Hang on a second while I... [hop hop hop on one foot while headphoned to the laptop and slowly dragging it off the table while trying to grab that backpack in the corner witn my toes]... Got it. Anyway, what were you saying?"
The iOS version of Skype has no "quit" option at all. If you ever open it for any reason, it'll dingle at you incessantly from there on out until you hard reboot the device. It's my current top annoyance with Skype.
So when they start announcing that annoyance as the big feature of their new version, it doesn't exactly get me excited to try it.