I would like to share a tip when buying blu-rays. Eventually we're all going to upgrade to 4k players, but meanwhile we use 1080 players (most anyways). And so I just wanted to share a quick tip when buying a movie on say Amazon.
It turns out that there's no price premium on 4k blu-rays, but they still include the 1080 disc, and (some of them) also include a digital copy.
So, buying 4k now, is going to pay for itself in the future, if you don't already own the movie in 1080.