Google Hangouts work on PCs, laptops, and phones. When I get a hangout call, it rings on all devices where I'm currently logged into hangouts.
TV is the only place Xbox wins today. Though google does have some TV toys right now (Google TV and Chromecast). They could probably look into adding a webcam to that with hangouts.
I prefer G+, but the onboarding - actually getting disparate folks easily invited and notified has been inscrutably hard. Part of the prob is that I have multiple gmail accts and address books as do the folks I'm inviting, but another prob seems to be the less than ideal invite workflow. When Goog gets calendars, gmail, docs and hangouts well integrated, Skype will have a serious threat on its hands.
My invite workflow is "Skype everybody the G+ URL"... If they could make a better workflow that'd be great. Maybe they could stop tripping over their feet trying to make everything social and just make this workflow make more sense!
Funny, because I dont know anyone who use G+ at all. Except these who was forced to make G+ profile while was registering just for e-mail.
And same time I know hundreds who use skype on daily basic on literally every device they own. Including TV. Only device in my house lacking skype it's refrigerator.
You dont need to use G+ to use Hangouts. If you have a gmail account you're a one step install away from using video chat. Doesn't matter if you have multiple gmail accounts or not, you just need a link, which hangouts gives you in the invite modal.