ps3 uses a cell processor, which is closer to a gpu than a cpu and isn't suited for regular pc apps. it was made for running mass small calculations, such as md5 cracking.
Actually the cell processor is designed to do a massive amount of 128bit calculations, using several SPE's Each SPE is designed to run 1x 128 bit Single precision Floatpoint, 2x 64 bit double precision floatpoints 4x 32 bit, 8 16 bits or 16 x 8 bit Single precision Floatpoints. During each Clocksicle, these numbers are calculated paralell.
the SPE calculates a maximal amount of 8 single precision floatpoints per cycle. wich is about 26 Gflops.
Also each SPU is connected to there own memory space and cache, the ppe and a 128 bit elements controller. In short, there nothing these processors are nothing like gpu as they can handle up to 256 exbi-exbibytes calculations. short, Super computers. also the ps3 has 8 SPE's, but it only uses 7.
Also windows installation is blocked in the chips due to license problem

Emulators arent worth it. Linux works well on it, but granted there not designed to run on a console. Build a linux purely based on the ps3 infrastructure and it would run like a charm.