I just watched Dunkirk too to christen my new 4K setup. Christ almighty that is a brilliantly put together film.
Watched it the other week. Loved it. My family thought it was made unecessarily confusing. I enjoyed how it all came together.
And congrats on the 4K! My residential future is too uncertain for me to invest in any such thing for now (I’ll just end up having to move it 5 times…). But once I settle a 4K home theater setup will be the first luxury I budget for!
EDIT. I think future film purchases will be 4K/BD combos when available. Definitely for TLJ anyway. Time to future proof.