Feature Request: Option to remove focus from all windows on Primary when the cursor leaves the screen

On my home setup I suffer from the following problem:  If my primary computer has a web browser up and that window has the focus, when I switch to a secondary machine my typing will appear back on my primary, sometimes immediately, sometimes after a few keystrokes.  The issue has been raised before and I have been dealing with it by setting the focus on my primary machine to the desktop before I switch.  Bot this is a real nuisance.

Today I thought of a way to circumvent this.  Win7 has some built-in functionality that will have the focus "follow" the mouse.  Back in the day it used to be a PowerToy feature.  You can google and find other mouse utilities to do this too but essentially... 

Type “mouse works” into the search box in the Control Panel, and you should see an item called “Change how your mouse works”.

In this screen, scroll down and find the checkbox for “Activate a window by hovering over it with the mouse”.  Check it.

Now when I move the mouse off of the screen it de-selects focus from all active windows on my primary system.  I am not crazy about the follow-the-mouse behavior that this enables but it is better than the alternative to me. 

Given that this problem is annoying and I am not the only one experiencing it, I would suggest that Stardock adds an option to de-select all focus from the primary computer, or move focus to the background, when the mouse leaves the screen for more than 500ms or so.

Thanks..

Dave