Apple has today released a developer preview version of Lion, and has also updated the page for Lion on its website. The page hints at a completely new version of the Mail App version 5 that includes the look and feel of the Mail App on iPad.
With Lion, Apple plans to combine the magic of the iPad and the power of Mac OS X. The new mail App features a completely new layout, like the Mail App on iPad and includes new features like Conversations, better search, and larger previews.
With the new conversations feature, you can now view all the mails exchanged between you and any other person all in one place to stay updated. Clicking on a conversation would display more details and the complete message.
Mail 5 is faster than before, and looks absolutely stunning.