I am assuming, and this is just an assumption, that what Chen meant is that they will be able to update their apps (hub, keyboard, etc.) independently from carriers. Since they aren't messing with the core OS. Which makes sense, they are just separate apps. They'll still have to get Google patches for the OS, and still need to wait for a major update, like from 5.0 to 6.0. But at least they can keep the "blackberry experience" up to date.