The WD TV Live isn't as popular as the other devices on this list, but it's actually a pretty good device, especially for users that have a lot of ripped or downloaded movies already (and it supports quite a few formats). WD TV Live comes in two flavors: a small, cheap, Wi-Fi-enabled box designed for streaming, and a more expensive, Ethernet-enabled box with a 1TB drive for all your local movies. The small box can play files off a USB drive, and the big box can still stream, but they're clearly aimed at two different types of users.
You will instantly get over 100 channels, and there are tons more that you can add along the way. PlayLater is software for your computer or mobile device that records streaming media, saving it to your device for future viewing. If you already have a streaming device or gaming console, you've already got most of the features offered by this software, but for $39.99 for lifetime access, you won't waste a lot of money trying it out.
The interface is great. It's fast, smooth, and incredibly simple. You have all your basic channels on the front page in a grid, letting you access your movies, TV shows, and music from iTunes, as well as streaming channels like Netflix, Hulu Plus, and sports sites like MLB.tv, NBA, and NHL. It even has a list of recent and popular movies along the top if you aren't sure what you want to watch, which is kind of fun. Anything else you want to play can be shot to the Apple TV through AirPlay on an iOS device, or via AirPlay mirroring on a Mac. It isn't ideal, but it'll get the job done for just about anything you want to watch.
ClearStream's final entry is the 4MAX, which is an improvement on the 4V when it comes to range and general setup. Quality-wise, this offers what you'd expect from the previous ClearStream antennas with a 70- mile range and 4K capability. That said, the 4MAX is able to bump up the range a bit in the right conditions. And it does use a more streamlined design over the 4V, making the overall setup much easier and saving a bit of space.