For laptop, two problems exist: 1) overheat by the intel chip; 2) unstable (crashing or frozen) by the window.
I owned a playbook for almost 1 year. You can hardly feel any temperature when you hold the playbook. Furthermore, it never crashes or freeze.
You are absolutely correct that BB10 plateform could be the future for super laptop with ARM chip, which will successfully solve then two problems stated above.
All rimm need to do is to figure out a way to make all the current desktop application runnable in its operation system. Or even better, the operation system can be run with desktop applications and apps for iOS and for Android.
You are aware that there are tablets other than the Playbook? And they all sell orders of magnitude better than the Playbook? And that the Playbook was an utter failure, selling 130,000 units in a quarter?