At the beginning of the year, manufacturers were showing off 4K resolution TVs in all sorts of sizes for all sorts of budgets. The question quickly turned to, “So what can you watch in 4K?” (It was a running theme last year.) Well, the TVs aren’t the only thing we’re starting to see more of; 4K content is here today.

In case you’re wondering why you’d want that, know that having that 4K resolutionme...