One of the things I'd do if I were in charge of RIM is pay the devs of the top ~100 iOS and/or Android apps to do playbook versions. I'd cover 100% of the costs of porting the apps over, and let them keep the revenue from sales on the Playbook. Maybe you even send in a team of devs to port the app for them.
You don't need 600,000 apps to have a good set. You just need the best ones.
I'd then make sure the next BlackBerry phone is a 4.3" 1024x600 device (same res as the playbook), and make Playbook 2 as a ~8 inch 2048x1200 device with the OMAP 5.
For the keyboard people, use the same 4.3" body and make the screen 512x600 (half vertical).
And I would test develop a device that is 4.3" with a full screen on one side, and the keyboard and half screen on the other. Use a switch very similar to the ringer/silent switch on the iPhone 4 to flip the input/output from front to back.
BBM + enterprise + unified development + QNX + top 100 apps + 4.3" retina + 8" retina + qwerty option = win