yea just replying to your JL mention
I also agree but not too long I expect. The GPU will 'last longer' in the sense that new CPUs seem to be the driving force in good clearance deals on older hardware so I reckon a few months. Some 1060 laptops are cropping up around £800 already. Also I'm not sure if HP's Omen brand is as respected as they would have everyone believe. Like you say, it's all relative/subjective.
I agree with both points. It's all subjective, isn't it. Purchasing depends on so many factors for the individual and how they're going to use it. How long is a 1060 gonna be relevant at 1080p, etc? But how long will it take for rigs like this to drop below £1k? Only time will tell, I guess.
It has an SSD, we've established that just the OP didn't mention it. Also many people don't want to go cracking open a brand new laptop. I appreciate that Turing or whatever will not be able for a while but I would still want to see preliminary performance at least, even if not buying it immediately. I wouldn't buy 2 year old architecture on the GPU and an outdated CPU if spending over £1000 even if these are both 'still good' (which I'm not denying). Your 1070 was a big step from the 900 series in efficiency and performance so I'm not surprised you're happy with it.
I am most definitely no authority on this but as someone who waited for Pascal, Turing GPU's in laptops could possibly be out in the Autumn. They'll come with hefty price tags and the 10 series won't see a price reduction for a little while, unless they release the lower end cards immediately. Which they didn't do last time. The laptop 970 didn't go down in price for quite a while after I bought my 1070. What I'm saying is, I have no regrets buying when I did.