The author of the text, a traveler and Zapier company representative, shares their personal experience with the Google Chromecast, a $35 HDMI dongle that streams content from laptops or mobile devices to TVs or projectors. The device is useful for business travel, presentations, and group discussions, as it eliminates the need for cables and allows multiple people to share their screens wirelessly. The author suggests adding a Chromecast to one's laptop bag for its convenience and versatility, highlighting its potential benefits in various business settings, such as conferences, meetings, and educational settings. While the device has some limitations, including potential connectivity issues with corporate networks or slow Wi-Fi connections, it is generally a simple and useful tool that replaces traditional display cables.