The UI remains largely unchanged from our previous encounters, though there are a few previously unseen highlights. It's still a three-element UI, with a central home screen showing running applications, an app grid, and the BlackBerry hub -- a feed of time sensitive notifications from email, calendar, BBM, social apps and more. The home screen hosts a maximum of eight active updating apps. Thanks to BB10's QNX underpinnings, users can have many more applications running, but the home screen only shows the eight most recent "to deliver an optimum user experience" (translation: allowing more live tiles would prevent things from running smoothly). BlackBerry hub is accessible at any time from within any app using a two-stage gesture -- swiping up from the bottom of the screen lets you peek at your notifications, and swiping to the right drops you into the hub where you can interact with those messages. It also bears mentioning that users can deal with the alerts from the feed directly within the hub, so no other apps need be launched to change a calendar appointment or reply to an email. Oh, and its API is wide open, so devs can tailor the hub to house notifications from any and all apps of their choosing.
BB10 also provides users with personal and work profiles, and has the ability to run apps from both simultaneously while keeping the data from each profile separate. That means that IT pros can set security parameters as strict as needed per corporate policies, but users still have the freedom to dilly dally at their time wasting websites of choice. Don't believe us? See BB10's split personality along with the host of newly revealed features in our video walkthrough. Oh, and you can also check out our liveblog for the full BB10 rundown.