They have no option here - using Google's app store comes with severe attachments that Microsoft is not likely to accept. My guess is that they are aiming at l

They have no option here - using Google's app store comes with severe attachments that Microsoft is not likely to accept. My guess is that they are aiming at lower end of market where the price is important, and betting on developers to port their apps. Which could actually happen if porting is not a big issue. OTOH, Google is putting more and more stuff in closed source part of OS, so the platforms will inevitably diverge. It might be a bit late for Nokia to do this... we'll see.