Google has introduced yet another innovative feature! Innovation, not because its desktop notification, but because its HTML5 based desktop notification. Its currently working only for those who have enabled it and using Chrome. They are working to make this feature available on other browsers too.
To enable this, use chrome and login to your GMail. Goto Settings. Enable notification and save it.
Chat notification example:
Email notification example:
Open Google Chrome browser. Goto Options -> Under The Hood tab -> Privacy -> Content Settings. Or click on the settings icon on the chat or email notification.
Source: GMail Blog
Do you prefer to enable this feature or let it be disabled ?