I think it depends what you consider equivalent, neither the 1080ti nor the 3080 were the top dog card from Nvidia. You've got 3090 considered as Titan class if you believe Nvidia (tbh, with 24GB VRAM it does kinda feel that way) and the Titan was not £650.So that £650 equivalent product is now approaching 2k
They are rinsing the prices on the high end but I just fall back to the point that 3080 MRSP buys a very fast card, and crucially what I'm saying is I'm expecting it to still not be a terrible deal relative to what else you can buy at the same time when next gen comes out. In other words, you are not going to be buying a card that is stomping all over the 3080 for under £500, I'm sorry, but I just don't see it. Surely if they have any sense this 4070 or whatever is going to be a £750 card, meaning the 3080 shouldn't fall of a cliff. The new gen should kill off the 3080ti and above prices, but unless they pull a rabbit out of a hat the impact on the 3080 should be a lot less.
In other words I'm saying ignore historical pricing concentrate on pricing when 4000 series launches, weighing up the relative performance to price ratio, I'm expecting the 3080 won't fare all that badly.