These are not the cards people should be buying either tbh. It just sends out the wrong message to Nvidia and pals.
AMD are proper taking the pee with their £999 card, and that will just enable Nvidia to charge £1200 for this one. Why not? it will be faster, have more VRAM and all of the features that are so important mainly to Nvidia.
So to answer the question.. No. I would not cancel a 3080 and order this. Not at all. The 3080 would be about the maximum I would spend any way. Extra VRAM will make no difference unless you need it, and those extra CUDA cores are predictably going to make no difference either, given they barely do on the 3090. Which is already massively over priced.
I had an issue with 8gb because quite frankly it is not enough for a card of he 3070's calibre. I mean the 3070 has enough chops to be a 4k card and the only thing limiting that is the VRAM. And it does, whether people like that or not. The 3080 however seems to have no such issues with 4k, so spending anything more than that right now is daft, given the hike in price for 10% more performance, and probably less out of the 3080Ti.
What concerns me now, however, is the growing popularity of PC gaming, the fact it has totally become a bragging right article (with prices to match) and what Nvidia will be charging for their next little outing to TSMC. Because if you think these cheap Samsung prices are bad then you had better sit down for the next TSMC release.
Normally to any sane individual (I don't count in that equation) I would suggest no more than a 70 series card. However, given Nvidia have derped theirs this time around (for good reason, no one would buy the 80 series otherwise) then I would go as far as to recommend a 80, if you are gaming at 4k. For anything else the wise choice is a 70, priced as closely to "RRP" as possible, without buying a pile of plastic crap.