This is because most of the heavy lifting is done on your phone. You've got a powerful computer already in your pocket, so the dongle capitalises on that to keep costs low.
I picked one up about a month ago and it has revolutionised how I watch TV. My housemates and I don't have to search for a laptop and HDMI cable to watch movies or worry about battery — anyone can throw on a film with a single click.
A Google employee demonstrates playing a video on a phone and transferring it to a television using the new Google Chromecast SDK during a Google special event at Dogpatch Studios on July 24, 2013, in San Francisco, California. Google announced a new Nexus 7 tablet made by Asus and the Chromecast SDK.Justin Sullivan/Getty Images
And if you've got friends round, you can make a queue of music and videos via YouTube that anyone can contribute to via their phone.
Sure, so this isn't just breaking news. The new Chromecast launched back in September 2015. But I'm not exaggerating when I say that it's one of the best gadgets I've bought in years. Don't bother shelling out for an Apple TV or smart television: This is all you need.