I am really starting to enjoy the BB10 experience on the Z10, and am attempting to keep my T-Mobile SIM in the device for the entire month of April. If you don't yet want to commit to buying a Z10, CNET posted news on how you can preview BB10 on your iPhone or Android device.
Simply visit BlackBerry.com/glimpse with your mobile phone browser, and then tap on the Try it button. You won't see your data in the preview, but you will find an interactive tutorial that walks you through the BlackBerry Hub, peek at functionality, TimeShift camera mode, BBM Video Share, and BlackBerry keyboard experience.
You can see more of BB10 in videos from BlackBerry and in reviews online, but it is helpful to also try some of the gestures on your existing iPhone or Android smartphone, too. As a user of the Z10, I can tell you it is much more fluid on an actual Z10.