@spoochy: Better than which one? The Rift S is also wired, and rumor has it that the HP Reverb is a better overall product. Or do you mean that it has outside-in tracking with the sensor things?

The Quest is entirely stand-alone - no pc, no sensors, no wires to your head. That is the one I am interested in. Convenience and mobility over processing power. VR + Gameboy = win.

however, all Quest games will be playable on the Rift.

I am not sure this is entirely true. Most Quest games are actually just ported Rift games, so they are already on the Rift. Also, in terms of processing power a Rift-capable rig will be able to run any Quest game. So most Quest games will also be on the Rift. Rift is a market that is too big to ignore.

The Quest can do things like larger play areas that are harder to do with the Rift. It is also able to do more stuff like location-based VR. The Quest also will be more likely to share games with the Go, and even if they 'could' make it to the Rift that doesn't mean they will. As time goes on, I expect some developers will be willing to go more for the mobile-exclusive market even if Rifts cannot do it without a PC in a backpack.

Also, there is at least one announced 'Quest exclusive' I know of - 'Vader Immortal' which might not be exclusive forever, but who knows. Another long-run prediction - the Quest is going to sell like hot cakes and grab developer attention. People will be asking if Quest games are going to be on their Rift, rather than asking if Rift games will come to the Quest. Stand-alone is the future. Bank on that.