This is cool, but I'm not a big fan of "fogging" as a UI tool. I noticed Vista/Aero did this quite a bit.<p>The fogging just obscures information, but replaces it with something that is distracting. You might get an impression of what's there, but it's a tax to comprehend it. OS X (tend to) do this a lot better - if it's not useful, don't make the user squint at it.<p>Feels like a pure eye-candy effect with no benefit to the user, but I'd be interested in counter arguments/examples.
using:<p>color: transparent; text-shadow: 0 0 5px;<p>Works way better for text on non-webkit browsers and is supported by everything but IE (and even that supports it in 10)<p>The current form of the blur on firefox is just plain ugly, and seems to be an overly complicated way of achieving the effect.
Why only include support for webkit browsers? When Mozilla and Microsoft implement the other parts of filter into their browsers, wouldn't you want native support there as well?
Sad thing: I bet this will be abused in a "Please login or signup to view this content!"-way.<p>Good thing: Instant bypass using 'developer tools' or firebug...
This might improve the user experience by visually signaling to the user that their mouse click to submit a form has been registered by the browser, and please do not click again while the server is processing your input.