The PS3 is a success story thus far, however I feel as though one of the kjey features that it is missing that made the PS2 such a success is the common touch. The PS2 was cheap and easy to produce games for and so this added to lots of movie tie ins, Product based games (think disney/lego) and popular based games (Singstar etc...).
The wii has taken this crown from the PS3 now.
However I feel as though to be deemed a success the PS3 must reach a sales figure of at least 40 million by the end of the current generation. It is on target for this but it needs to keep up.