Chips based on this architecture AMD calls Accelerated Processing Units or APUs from the old idea that graphics processors are hardware accelerators for rendering visual data.
Even with RIM's recent efforts, there are too many BlackBerrys around whose operating systems and processors are too old and slow to make it worthwhile to spend scarce team time on them, says Mr. Stein.
It's a tricky balancing act to pull off, and lots could go wrong -- for instance, it's not exactly clear how smooth it will be to switch between the two types of Windows, or if you'll even be able to get the old Windows on certain types of tablets (that is, tablets that run the power-efficient ARM processors used by the iPad and most other tablets today).