I primarily use i3wm with 4-40 terminal windows + firefox open. I'd LOVE it if the terminal that I'm looking at was the `active` one. I can't count the number of times I'd lookup some error code, type in more commands, hit enter; only to discover that I had been typing away in the wrong window.
This will be no problem at all in the sdk. Hell I saw someone do this as some point on the mac using the macbook camera popping windows to the front based on eye-dwell... I think they started with cursor control.. essentially eye-mouse.