This is brilliant, but now it's only a matter of time until it's in actual use. Sort of like how evercookie was a clever hack meant to call attention to privacy concerns, then was put into actual production sites.
I'm not sure if you can say that it's a direct result of Evercookie, but a number of high profile sites use this kind of tech - for example KissMetrics.com is used by a number of big companies, and they use ETAG cookies, Flash cookies - the lot.
