I travel internationally all the time. Someone tell me why I need this.

You have a workplace that insists you are working from your home while you travel.

It has limits, like the amazon hardware keypress thingy with north korea showed recently, but unless your working at superbigtech or defense contractor it would probably work.

connect screenless devices, e.g., Echo Dot extend weak wireless range in hotel screen share or network between multiple devices eg travel with two laptops and can virtual KVM only have to do the captive device on one - many hotels limit number of devices extra security buffer phone can't bridge wifi for headless like this etc etc