the difference is that VR requires you to literally isolate yourself.
instagram, facebook, text messages, phone calls. you can do all of those things and share them with real people in real life. you cannot do so with VR. it's literally and inherently isolating.
just the other day I was at a restaurant and a group of people were typically all on their phones while waiting for their food. eventually one of them found something amusing and put their phone on the table propped up by a salt dispenser and they watched some video together.
that's the difference.