Motorola was already in my top position in the list of possible upgrades for my old (ASUS) phone, for providing at moderate prices USB 3 connectivity and DisplayPort 1.4 that allows the connection of an external monitor, for a desktop mode.
With this announcement, Motorola has consolidated its top position, making it unlikely for me to choose something else.
Unfortunately many Motorola phones (even flagship) do NOT do video out.
What do you mean desktop mode? I though only Samsung Android phones had that, called Samsung DeX.
Bear in mind it will solely be future devices which are supported. They're being developed and aren't launched yet.