I'm a relatively new VR user, so I'm a little less burned out from the apparent stagnation than someone who's been doing this since the Oculus Rift dev kits, but I think maybe you're being a little pessimistic?
> The VR industry seems to think PC gaming is dead
Sad, if true. This is definitely how Oculus seems to feel about it, but maybe they're just ceding that segment to HTC.
> HTC hasn't released a marginally better headset in three years
Their upcoming roadmap seems promising even if it's only evolutionary changes. It also seems like they're not abandoning the high end.
> Future headsets are adopting inside out tracking despite it having worse performance than lighthouse
It's strictly worse in terms of sheer "performance", but it can be potentially so much better in other terms that it might be a better idea to dump engineering effort into improving the performance until it's good enough.
If I set up my tracking sensors perfectly and go through the calibration ceremony, my VR environment would be capable of higher-precision tracking than is possible with inside-out technology. At least, it is until a cat knocks into my sensor, or the USB connection flakes out, and I have to recalibrate the damn thing all over again.
This has happened before. You can (or at least could) get better photographs from film than from digital. CRT displays are (or at least were) capable of better image quality than LCD. Gas tanks can store more energy than the batteries in a Tesla and can be refueled faster than the battery can be recharged. The .30-06 cartridge is more lethal than the 5.56 NATO. Analog telephony has higher sound quality than digital.
However--digital cameras are far easier to use and make the photos themselves easier to share and store, so they got the image quality good enough. LCD displays are less bulky and more energy-efficient, so they got the image quality good enough. Electric cars are more eco-friendly and can deliver higher performance due to the mechanical simplicity, so they got the batteries and Superchargers good enough. 5.56 has less recoil, particularly in full-auto or burst fire, and you can carry more rounds because each round weighs less, and the rifle itself can be lighter. Digital telephony scales better and suffers less quality drop for mobile phones, and VOIP dispenses with dedicated telephony infrastructure entirely.