RIM is going to support as many different application frameworks as it can in order to maximize software availability. Of course, the problem with that strategy is that applications from other platforms won’t integrate well with the PlayBook environment. RIM also runs the risk of undermining incentives for developers to create dedicated PlayBook applications by making it so easy for them to port their existing software from other platforms.
Their strategy is clear: throw everything out there and see what sticks—let the user decide on the best experience for themselves on an app-by-app basis. ‘Cause you know, more choice is always better.