The only VR headsets I've seen so far in stores around here (a major metropolitan city) are headsets with only the lenses, in which you slot your own smartphone as the screen and CPU. Wouldn't these also count as standalone devices in your classification?
[I've had the Google cardboard, DayDream and the Samsung Gear headsets.]
Its like comparing a pre-model-T car with a car from 1950. You might argue that for some purposes both are equivalent but that doesn't capture the qualitative improvement that has happened almost everywhere. Everything is improved and some areas feel perfected in comparison.
Do you mean the Valve Index or the HTC Vive?
Until recently, the Oculus Rift S would be a great pick for that.
I don't yet have an HP Reverb G2, but I expect good things out of that headset. The HTC Cosmos would also be a good choice.
The Valve Index (yes, I mistyped before) is an awesome headset, but the lighthouse emitter based tracking system isn't great for seated. Not only is it a hassle to setup, but it's easier for your chair or monitor or whatever to block the laser grid from the lighthouse units. And if you're seated, you aren't taking advantage of the highly accurate room-scale tracking the lighthouses provide. I'd stick with the convenience of an inside-out headset if you're primarily doing seated VR.
For example, I tended to prefer my Rift S for sim games (sim racing, sim flight) for all the reasons listed above.
For headsets, there are several properties that segment the market:
1. Tracking: outside cameras/emitters vs inside-out tracking
2. Tethered vs wireless (including PC powered, but using wireless transmission)
3. PC powered vs standalone device
For each of these, there are multiple vendors to choose from, except for standalone devices. In this case, the Oculus Quest is unique. There's no other competition.
Moreover, the Quest is the only device that can be run without a corresponding high end PC. If you don't have a PC like that, then the cost is prohibitive. There's also the space factor. VR needs space, which is already an issue. With the PC powered headsets, you also need that PC to be close enough to your open VR space. Otherwise, you need to rearrange your living space or invest in a VR dedicated PC.
In summary, the Vive Index is fantastic and arguably the best headset in the market right now, but the Oculus Quest fills a different niche of that market.
(And as to the topic of the article: I'm done with Oculus based on Facebook's policies).