The similarities between the OS we see in the picture and what we've grown use to with the PlayBook Tablet OS are definite visible. The addition of BBM, in the homescreen worries me a little about this potentially being fake. Nonetheless, RIM could have a working version of BBM on BBX that we just don't know about.
According to the leaker, this BBX phone is said to have a 1.5 GHz dual-core processor, 1GB of RAM, 16GB of on-board memory, 8mp rear and 2mp front-facing cameras. The BlackBerry "London" is said to be thinner than the iPhone 4S and about the approximate size of the Galaxy S II.
The design of the phone resembles the Porsche exclusive BlackBerry P9981 and contains what looks like a small bezel around the edges. The BlackBerry "London" also has no buttons as we've been told multiple times it wouldn't. All in all, it does look a lot like a PlayBook in a smartphone style.
I personally am in love with the sleek and simple look of not only the phone but the OS. It's not often we get a single clear picture that shows off both the hardware and software so if this turns out to be true, we are extremely thankful for the leak. Many have been doubting RIM's ability to put out a quality phone with their BBX lineup. Truth be told it wouldn't surprise me in the least bit if this was an "intentional" leak to get the masses to start talking about what's to come to the BlackBerry world.