Since Blackberry is unable to work with the Playbook hardware and they are withdrawing support, why don't they at least open the platform so that android can be ported to the device? HP failed with the TouchPad and so made it open. Users happily used android on the TouchPad after that.
We are sideloading android apps to the Playbook anyway. This will only improve the end-user experience and satisfaction, since the hardware is so good already.