Powered by a smartphone’s processor, storage, and connectivity, laptop docks should be a showcase for desktop environments such as Samsung’s DeX. But the small teams creating them haven’t supported a quality experience. Almost three years ago, I wrote about the then-growing crowd of desktop environments embedded within smartphones. These environments kick in when you connect a smartphone to a larger monitor. Doing so with an iPhone allows you to simply mirror your display. But a Samsung phone equipped with the company’s DeX environment (Galaxy S-series and Note) offers the option of a  desktop experience that includes a taskbar and runs Android apps in resizable windows. Add a keyboard and mouse connected with Bluetooth or a USB-C hub and, voila!, you have a comfortable PC-like environment. You can still use Microsoft’s free upgrade tools to install Windows 10 on an old PC running Windows 7 or Windows 8.1. No product key is required, and the digital license says you’re activated and ready to go. When these environments first appeared, they were focused on the scenario of someone bringing a phone into an office where they would connect to a des...