Jayztwocents has a nice bit on this; with the new numbering, also goes the Titan brand - the 2080Ti being the Titan, so cost-wise, these are all in line with previous generational launches. My 1080Ti (15 months old) is still the same price now as it was when I bought it (just prior the the whole mining thing), so I expect the 10 series to see some significant drops once the 20s start hitting the streets (and I'm seeing that now via the usual newsletters).
Ignoring the, albeit lovely, Ray tracing, it's really only important that basic rasterised gaming performance is boosted significantly enough to warrant a purchase. Doubly so for VR (and I'd ignore RT in VR completely for a looooong time). We have no analysis at all yet, so it's obviously worth waiting - and beyond the dozen or so games that use the new tech (RT and the AI stuff), there's probably little point on dropping £1k on a new (ex)Titan if you didn't in the last generation.
VR is fine as is - but I game in 4k when not in a headset, so if that performance increases nicely (real world, not graphs created by Nvidia) then I'll probably get one.