I'm not sure what to think on this.
One the one hand, we're seeing good performance improvement versus previous generation, like we used to get. The prices on the 3070/3080 look reasonable when compared to what the previous gen has been marketed at.
One the other hand, if you ignore what's happened to prices in the past couple of years the value proposition is much less appealing. The 3080 looks 'best value' but at £650 it is actually still very expensive by traditional standards. No cheaper than the 1080ti monster was at launch and doesn't compare well to yesteryear. 3070 looks like a 'cheap 2080ti/2080s' but those cards are arguably overpriced.
Maybe I'm just stuck in my ways but I can't bring myself to consider these sort of prices. I've been buying cards since the 90s and the most I've ever spent was £270 on a secondhand 1070ti two years ago [wow, didn't realise it was that long until I checked my mails!]. And that's included some decent stuff along the way, GTX280 for example was at the time the top Nvidia card but still came in under £250 brand new. I think 3080 would be a really nice upgrade (more of an upgrade than some of the other switches I've done) however I just feel like I would excitedly run a few benchmarks, crank up some settings and then a week later be sat there thinking "I've just spent £650 for what, a bit better performance when I don't even play modern games that often anyway".
GTX280 was when the pound was strong, literally the peak before the crash and reams of quantitative easing devalued the pound to its current lows. Even normalised for inflation you still have a point, but it's not quite as clear cut. GTX480 replaced it and was £350-400 IIRC.