If you want a good view of where BlackBerry 10 is today, check out this video. TechCrunch is at CTIA’s MobileCon in San Diego and they're taking BB 10 through its paces. BlackBerry 10 looks like a little bit of Android mixed with a little bit of webOS.
Overall performance seems to be fluid and fast, and it looks like RIM has put a lot of thought into this OS. It seems like they're very late to market as it will not be out until next year, but at least they're headed in the right direction.
The hardware seems clunky but I'm assuming it's just an early developer model that will be refined when BlackBerry 10 launches.