I wouldn't count of me being totally right with predictions of what Intel will do and when, but certainly, my guess is that Coffee Lake for mobile will be next year as Laptops are just beginning to be announced with Kaby Lake R.

As for laptops under £2k
https://www.scan.co.uk/products/173-...x-1070-dvdrw-w

If I had a slightly better budget of £2.5K
Slightly newer version with GSync.
https://www.scan.co.uk/products/173-...1tb-hdd-usb-ty

Not that I'm hard set on ASUS products, but out of the features they happened to come in at the right level.
I also prefer a 17" screen over 15", so you can get the same other features at about £200 less if you go down to a 15"

Also, for portability, yes, they are heavy to lug around, but as it is usually between home and a hotel room, and this is via car/plane/train, I'm not carrying it for miles on end. If it was a daily work machine, 3Kg starts to get rather tiresome after a mile, although backpacks are better than shoulder bags, but you end up with a bunch of extra peripherals, like PSU/Mouse/etc. For gaming, I have a decent gaming mouse.

I have a lightweight wireless mouse for the work notebook (logitech m525), which I am happy with. Also have an external KB for it too (K270), but I don't always take that, depends on what I'm doing for the day.