I should probably clarify that this is useful for changing the Owner and Location of devices in situ. It’s not going to move devices between hubs, for example. It is also not going to transfer Routines etc.
In the context of this thread the idea was to move devices from a V2 hub to a V3 hub with a different Owner and Location that could be left behind when moving house. It wouldn’t do that directly. What it would allow is for the V2 and all the devices connected to it to be moved to the new Owner and Location in a matter of minutes, and if the idea is to still to retain the V2 then a ‘hub replace’ to the V3 also only takes a few minutes. So it may suggest an alternate approach.