The clue is in the name - Rome is a homophone of roam.

"Project Rome allows developers to write apps that can run on multiple devices and travel with the user as they switch between devices." [0]

So it's allowing a programmer to sync and script behaviours from Android/iOS phone to Windows desktop to xbox etc using a MS login.

I would assume it's the technology behind the Your Phone Companion app that sends an SMS from a connected PC.

[0] https://docs.microsoft.com/en-us/windows/project-rome/

Yeah in general Microsoft does a horrible job at actually conveying useful information, this is no different.

Here is an example from their docs...

"The remote launch feature enables task-oriented user experiences; a user can start a task on one device and finish it on another. For example, if the user is listening to music on their phone in their car, they could then hand playback functionality over to their Xbox One when they arrive at home. Remote launch allows apps to pass contextual data to the remote app being launched, in order to pick up where the task was left off."

It seems to be Windows' version of Handoff on macOS, but much more flexible

Also struggling to understand what this even is.

Very poor presentation this.

Exactly my thoughts. Is it a web something? Xamarin something? Unity something? ...