This is a good news for users who are with slow internet connection or dial up connections. Not only this is a useful feature if you don't want to load everything inside the Gmail and just want check the recent emails.
Gmail lab has developed a new feature that you can just preview latest 10 messages of the inbox.
You can not read the full message by clicking on each of them, it just preview the new messages of the Gmail Inbox.
How to enable the Feature :
Just follow the link to Enable this feature on Gmail lab section under Settings tab.
Then click on Inbox preview section to activate it.
However there are already several other tools which can enabling the quick preview of Gmail Inbox such as the Firefox extension 'Gmail Manager'. Go here for a complete list of Gmail tools and external applications .
You can view new developments of Gmail lab under the settings of Gmail.