If you’ve shopped for a new TV, monitor, laptop, or game console over the last decade or so, you’ve probably seen the phrase “4K UHD” on most web pages, ads, and product boxes you’ve come across.

I'll start with the bad news. Even though TVs with 4K/Ultra high-definition resolution have been available for a couple of years now, there still aren't a lot of actual 4K TV shows and movies ...