When it comes to browsing, BlackBerry 10 HTML5 score knocks out all mobile & computer browsers. This well powered capability of BB10 gives advantage to developers in creating rich HTML5 apps. Leveraging the success, RIM builds its native Twitter client completely based on web & this is how it looks. Though its still a Beta OS screenshot, we may see a totally different client in the final release of BlackBerry 10 OS on January 30th.

Source: Tinhte