To me, and I suspect to many Windows users, it would be intuitive for Windows to bring whatever window the mouse is currently hovering over into focus without the need to click on that window.
It turns out that Windows 7 now makes this possible. I stumbled upon this tip when writing my ‘How to Shut Off Windows 7 Aero Snap – Stop it from Auto Arranging Windows’ post.
There are two additional reasons why I want Windows 7 to activate (bring focus to an ‘out of focus’ window) by hovering the mouse over it:
1. Symbiotic With Single-Click Item Activation
For the better part of a year I have been using the ‘single-click to open’ option in Windows Vista and Windows 7 (The option has been around since Windows 95). The idea behind this one-click option is to make the Windows use experience similar to the web-browsing experience. Instead of double clicking icons and options to open/access/activate them in Windows, you need only click icons, items etc. once.