Those of you familiar with past coverage of the Sony-IBM collaboration on Cell processors should be familiar with Jon Stokes' take on the matter: the Cell is a high-performance chip that happens to be okay at running games.
This makes it a good fit for clusters, either via independent hardware or the independent SPEs in a Cell. Given the choice, the winning project did both: it networked a cluster of three PS3s and got the primitive recognition and matching implemented in a way that it can run independently in an SPE. The net result was a PlayStation cluster that could recognize specific objects in a second. By way of comparison, a single Core 2 Duo took three minutes to perform the task.