Personally, I'd say it's a mix of both as the Radeon RX 7900 XTX at $999 US being the $200 US lower in pricing is definitely far more attractive to consumers than NVIDIA's offering.
A price cut on the GeForce RTX 4080 would also mean that the RTX 4070 Ti which launches in January may also not feature the $899 US pricing of the "Unlaunched' GeForce RTX 4080 12 GB graphics card as it was supposed to.