Along with the Playstation Plus features of Firmware 2.0, the PS Vita will be getting a brand new app that allows email on the device, that'll be considerably easier to use than the browser.
The Firmware 2.0 app will allow you set up multiple email accounts for which you Vita will pull new messages automatically. Improvements have also been made to the browser, Twitter app and Content Manager, which can now be used wirelessly.
The Vita's browser has seen an upgrade in the way it renders webpages, Sony have also improved the content display performance by allowing more GPU power to be dedicated to the browser app.
Sony also states that 1080p videos can now run on the PS Vita. For more information, check out this video that Sony have released showcasing all of the firmware 2.00 features.