Nothing, they will sell out at inflated prices. The 4090 only went up over time with more availability. The 6 Astral 5080s sold yesterday people don’t care they will pay whatever even if they are getting a bad deal.Will be interesting to see what happens to 5090 prices once the UK gets say 1000 cards (of varying SKU) delivered between all the retailers. Maybe this will take until April, May or June, who knows.
I'm foreseeing mass returns to auction sites and retailers (via distance selling acts etc).