Did anyone care about the Emotion Engine? Seriously! It won't take long before people forget about the Cell.
Now, when I first heard about the Cell, I heard that it could "power-up" by sharing processes with other Cell processors. I assumed that it's not about the eight parts of the Cell but that you could have multiple PS3s or have a Sony TV or other Sony products with a Cell all working together to make games impressive. (Essentially a Sony product could be hyped up like "if you buy a Walkman, you can pump up your PS3 some more!)
Now, even if that were the case, it wouldn't matter one iota if developers don't put in the effort to use the PS3 to the max. Is it worth investing all that time and effort to render individual snowflakes (whether it realistically can or not) when a few layers of randomized white pixels would have the same effect? Are you going to make elaborate cutscenes in real-time and somehow think that's worth doing instead of a prerendered cutscene, for instance?
Granted, they could try and make a realistic game engine once (physics for every molecule!) and use it for a number of games...but then games would not only be more realistic but possibly more generic than they already are...which isn't a good thing. Or developers would get obsessed with having big war scenes with hundreds of soliders, planes, and bits of shrapnel that they forget about having good gameplay.