False. While you can send texts or make calls from Hangouts, you must do so using a Google Voice number. This utilizes your actual phone thus not requiring someone to have more than one number for you.
Actually, True.
If you ported your carrier phone number to Google Voice.. and use just that number. That's an option many have done.
But Hangouts (online) doesn't do SMS, for that you need Google Voice. But you can't send MMS from Google Voice. Motorola has a Chrome extension that handles MMS/SMS much but it doesn't "sit next to" your Hangouts (meaning the online protocol) messages. In summary, while I can, with my Moto X, answer both SMS/MMS and Hangouts messages on my Mac, I cannot do it all inside one app. Not a big deal to me.
As per usual, Apple did it later but in a more refined way. Google is getting there with baby steps slowly merging their services into one service.
EDIT: I should clarify since we're talking about Continuity that you can also answer and make phone calls via Google Voice on your computer -- and this does NOT use your phone as a portal (like Continuity) so, whether that's for better/worse, I don't know. Because at present while I can look at my GV call log it doesn't integrate into the phone dialer's call log. Whereas I'm sure with Continuity since it's using the phone as the device to make the call everything is logged in one place. Ha, again, Apple's is all in one place.
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