...so this new rumor would support a DROP in prices across the board.
I don't think so.
We know that the rumor is based on zero evidence. It is just someone's speculation. We know that Jensen uses market analysis and an algorithm to determine the price backstage at the release announcement. So, not even he yet knows the price. It's a bit silly to speculate that the price comparing a 3090 to a 3080 Ti to a RTX Titan indicates a price drop, because it is just way too specific of a prediction based on way too much rumor and speculation. Using such huge unknowns to pinpoint on a target is futile.
So, since this is all speculation, I am again going to say that I think that the prices will be on the higher side. But price to performance is going to be very key to deciding whether it is a relative "price increase", relatively "the same", or a relative "price drop". I think that the prices will be considerably higher than the RTX 2000 series (of course I could be wrong), but if the performance is as amazing as some rumors speculate, the "higher" price may be warranted in consumers' eyes and not much of a factor in purchase decisions.
All will be revealed in time.
"..this new rumor would support a DROP in prices across the board.
" - that means it's based on rumor, so yeah.. of course it's entirely speculation, as is just about everything related to unreleased hardware, but based on this particular rumor, IF the 3090/Titan is going to be cheaper than the 20series RTX-Titan, then it would follow that the 3080/3080Ti would also be released at a lower price point than the 2080/2080Ti. Wishful thinking of course. :)
I really have no idea what they will do or charge, but I am hoping, as you said, it is at worst kept relative to "2080/Ti performance per dollar" ..of course cheaper would be nicer.
I am hoping 3080 first, 3080Ti a week later, and Titan (aka 3090?) a little later, but might be the Titan/3090 out of the gate first. Hell, it could be a "2080 KO FTW STHU SSC Ti MkII OMGU812" for all I know.