[cheponis]

I don't understand why "focus on mouse" is any better than Windows' ALT-Tab (to rapidly switch between windows)? It will switch between the two most recently-used windows, or, if you hold ALT, it will let you switch among all windows.

The best way to do window focus, tho, is, I think, to have you machine's camera notice where you are looking, and automatically raise that window - iris tracking and window raising.

[notauser]

Alt-Tab always brings the selected to the front, which is annoying. Sometimes you just want to type into the bit of the window you can already see, without reordering the stack.