Apple, Google, Amazon and Roku are all competing to be your gateway to online video on a big-screen TV.
For regular, high-definition TV sets, a cheap model such as Roku’s $30 Express or Amazon’s $40 Fire TV Stick will do just fine.
If you have a higher-resolution 4K set, you’ll want a model that can display 4K video, even though there isn’t a lot of it yet. These range from the $70 version of Amazon’s Fire TV to Nvidia’s $199 Shield, which comes with a game controller that offers hands-free playback controls through Google Assistant.
And if you’re a fan of Apple’s iTunes, Apple TV is your only option, though that device won’t get you Google Play. Amazon video is expected on Apple TV by the end of the year.