It's funny that how author simply ignores the massive underlying changes in Vista such as UAC, integrity levels and outcome of all these changes. and believes that Vista was mostly about GUI.
There is well known old honeypot trick. using webbugs in a juicy mail stored in the gmail. This e-mail can be stored with label such as "passwords". When the attacker looks at it, it will load a remote image, and now you know, someone from an IP address just seen your e-mail.
But if you are someone who keeps cracking into gmail account you will just workaround it (easiest way I assume will be disabling Javascript?) if you go further you can just firewall everything except gmail, or use a proxy to remove this protection on the fly.
Even though this will provide some benefit against a serial cracker this will be useless at the end.