Let’s be honest, not every movie “needs” to be in 4k, but some really gain from that additional resolution - and that’s ignoring seating position and screen size. What are your favourite movies that you’d recommend in 4K over the same movie in 1080p?
For example, I always prefer Christopher Nolan movies, anything shot in 70mm/IMAX film and anything animated, set in space/fantasy worlds or BBC Nature documentaries to be 4K (and HDR preferably).
I still remember my first 1080p experience and that was amazing. Unfortunately it was Silent Hill (2006)! But Planet Earth (BBC) was soon afterwards. It was a good time to be a media consumer. 4K, whilst great and I love it, never had as much “wow” factor as the transition from DVD to BD, at least not for me.