It doesn't matter if the 2080ti is $700, if the performance improvement is only ~25% as I suspect based on the core count increase, the clockspeed decrease, and the IPC improvement (barring RTX performance), I'm not going to consider upgrading anyway.
Give me +50%-70% like the last two generations and I'd buy it in a heartbeat. I don't think that's even in the realm of possibility at this point.
I also won't consider ray tracing performance in my upgrade considerations. I don't care if it's 25x faster in ray tracing if it's only 20% faster in everything else. My 1080Ti is about as fast, and often faster, than my dual 980Ti's I used to have. That's a good upgrade.
I don't like price increases, but I do love the social/market experiment Nvidia is doing. It's actually very interesting. I love seeing what people's limits are for a product of this nature. $1000 clearly wasn't enough for Titan buyers, so now they get to spend $3000. That's still not enough, so I do expect them to push the Titan pricing pretty soon. Now previous $1000 Titan buyers get less for their $1000 with the Ti card, and the Titan buyers who can hang in there will get the good stuff for $3000.
They have a price for every buyer, from sub $200, to $300, $4-500ish, $6-700ish, $1000ish (if new Ti rumors are true), $3000ish for Titan buyers, and likely with the advent of maybe a new SLI Nvlink thing, Titan people would easily buy two of those cards or two 2080Ti's if Nvlink worked well.
My limit is $700ish for the card, and it won't be a mid range X80. That's for the Ti or I just sit the round out no problem. I can't trust the naming scheme either though. Nvidia is likely to brand the mid range product as the Ti now. They'd do it easily.