The BlackBerry 10 OS has a Siri-like feature called Voice Control that lets you speak some commands for it to execute, such as "take a note." The voice is harsher than Siri's, and the commands more limited, but it does work. Press the center button in the volume rocker to start it.
The BlackBerry 10 OS's Web browser is fast as promised. The browser has the bookmarking features you'd expect, plus the Reader feature that Apple debuted in iOS and OS X to show just the text of a Web page when desired.
The WebKit-based browser is also the most HTML5-compatible browser yet, according to the HTML5test.com benchmarks. It scores 485 points out of a possible 600, versus 386 for iOS's Safari, 390 for Android's Chrome (the browser in the Google Nexus series), 434 for Android's Browser (which other vendors' Android devices use), and 320 for Windows Phone 8's Internet Explorer. In fact, the BlackBerry 10 browser beats all desktop browsers as well.
Why Microsoft should worryGiven the superior user experience and capabilities of iOS and Android, it's unlikely any of them would switch to BlackBerry willingly. But even with its flaws, the BlackBerry 10 OS is better than Windows Phone 8, which is less capable and less refined. And let's be honest: Blackberry 10 OS is a good mobile OS in its own right.
The combination of the BlackBerry faithful eagerly awaiting a modern BlackBerry OS (which the BlackBerry 10 OS certainly is), a portion of the people yet to commit to a smartphone platform, and the disgruntled Windows Phone 7.5 users who found out after the fact that their smartphones would never run Windows Phone 8 could be enough to double BlackBerry's current sales to 10% of the market -- that's enough to keep BlackBerry in business.
After all, the BlackBerry 10 OS matches Windows Phone's best feature (the People app), outclasses it in most other areas, and fits better into a security-conscious corporation than Windows Phone does. And the Z10 is a nice piece of hardware.