There's a huge difference between immersiveness (you feel surrounded by the image) and presence. Good modern VR gives you a sense of presence, which tricks the body at a level below conscious awareness that you are somewhere else.
And presence is characterized by lack of nausea.
If your only experience with VR is cell phones or the Playstation 4, then you probably have never experienced presence.
Yeah, if you want to experience presence you basically have to use a Vive - a Rift might just about do it but you'll probably run into a whole lotta tracking issues thanks to their (awful) tracking solution.
Wow, even HN has been infected! JK, but Rift tracking is great too. For "room-scale" with good tracking you basically need 3 sensors (you can buy additional sensors). For some games that cause heavy occlusion due to needing to lie on the floor or whatever, you would have to put the sensors in ceiling mounts to get the full volume tracked accurately. And the tracking volume will be smaller for the Rift compared to the Vive, but very few people have a bigger than 2.5m by 2.5m space, which the Rift can track just fine.
I just got my third sensor a couple days ago, and it has made a night and day difference (there is also an option for 360 tracking with two sensors, but I didn't set that up). But even when I had two sensors the tracking was fine except under certain situations where my body would occlude the controllers. Not a problem anymore after the third sensor.
And presence is characterized by lack of nausea.
If your only experience with VR is cell phones or the Playstation 4, then you probably have never experienced presence.