Edit: The 3090 was just launched, and it was $1500, so I was technically right. However, the 3080 and 3070 were also launched at $700 and $500 respectively. Those are the same prices that the 2080 and 2070 were launched at, and they deliver way more (50% to 100% more) performance than the old cards.

While I was technically right in that the 3090 launched at $1500, substantively I was wrong because the other cards were way cheaper than I was expecting, and you're actually getting way better performance per dollar with these new cards.

So everyone is waiting for Nvidia to announce their next generation of GPUs on September 1st, and while a large jump in performance is expect, I expect yet another increase in price over the nearly 2x increase we had from the 1080 Ti to 2080 Ti ($700 -> $1300).

It used to be the case that new process nodes would bring much lower costs on a per-transistor basis. However, starting around the 28nm mark, that was no longer the case. Now the main advantage of these newer nodes is power-efficiency and performance, but at a higher cost. And we know that 7nm is expensive.

With this new generation, Nvidia is believed to be moving from the now mature 12nm process to the cutting-edge 7nm process, and that will bring with it extra cost. So I feel comfortable predicting that Nvidia's flagship "2080 Ti equivalent" chip will cost $1500 at a minimum.