You're joking, but I recently thought about the idea that we could actually use the advent of cheap eye tracking software for gaming to write an EasyMotion-like

You're joking, but I recently thought about the idea that we could actually use the advent of cheap eye tracking software for gaming to write an EasyMotion-like plugin that moves the cursor to the position on the screen you're currently looking at. For now, this will sadly likely keep to prove difficult since the driver situation on linux isn't really good yet.