Zeus, you're thinking too high-level here.
The Cell is a processor, plain and simple - I would liken it to the "engine" of a computer system. Basically, all a processor does is it sits there and waits for the software to say "take this data, do these calculations on it, and then send it over here," and it does it. The only difference between the Cell and a Pentium/PowerPC chip is that the Cell does it really fucking fast - so basically, whether you're putting the Cell in a PS3 (where its calculations are going to be involved with AI, running physics engines, and helping out the graphics processors) or in one of Mercury's systems (where its calculations will be used for processing and interpreting radar, sonar, medical imaging, or semiconductor inspection data) it's still doing essentially the same thing.
The only "diversity" associated with the Cell will be the systems around it. And specifically to the article you posted, I believe that Mercury will be able to produce great systems using the Cell as the core processor - they're an excellent company and have long been known for the high performance of their products.
Of course, it's not surprising that I would say something like that, seeing as how I work there.
(And let me tell you, this was a total "worlds are colliding around me" post. Blew my freaking mind.)
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