I actually watched this last night. Excellent movie, not quite as good as Get Out, but the performances, style, pacing all exceptional.
The movie is an easy purchase for me, but I want a premium version, so no thanks Zavvi.
I get the push for 4K but still think it's unfortunate that many of these new films are not getting regular 1080p Blu-ray only disc steelbooks in the UK - alongside the 4K + BD (+3D) sets - if only to please those customers not looking to upgrade to 4K within the next few years, who are not happy to pay £30 a pop and who still wish to buy steelbooks priced 'reasonably'.