I've been using Samsung DeX on the Galaxy S25 Ultra to see what's new about it. Unfortunately it's a wasted opportunity.
DeX for Windows enabled the ability to turn any Windows PC into a DeX device, powered by your Samsung smartphone. Now, Samsung recommends users switch to Microsoft Phone Link in place of Samsung DeX.
That's probably why I've always scoffed at Samsung's DeX mode. If you're unfamiliar, DeX is the optional desktop experience ...
Samsung's DeX platform already lets you run Android in a desktop-style mode with an external monitor. But DisplayLink envisions something more akin to a true multi-monitor PC experience.