[rsync]

"Exactly as you indicate, even in "classic" terminals we have features like unicode support, color, geometry reporting, mouse reporting, window title manipulation, arbitrary cursor movement, etc."

Is that true ? For instance, I am not aware that (for instance) the OSX terminal app does mouse reporting or geometry reporting.

Does default xterm ?

[Crito]

Yes. For instance, Vim necessarily knows how large the terminal it is in is. Vim also supports mouse input, allowing you to click around in different windows and whatnot.

[judk]

In Terminal.app you can use the mouse to move the cursor at the command line. Since at least 10 years.