The PS3:
1) Is going to sell ~70-80M less than its predecessor. This is the largest absolute drop off in sales intergenerationally, larger even than the drop from the SNES to the N64, or the NES to the SNES.
2) Is also going to have the largest market share drop on a percentage basis rather than an absolute one.
3) Has lost ~5 Billion dollars, the most money ever lost on a single venture in video game history. More than the original Xbox (infamous for its loss leading), more than Dreamcast.
By virtually any reasonable metric, no system has ever done as poorly as the PS3 has. The only lense through which it "beats" the other failing systems (like Dreamcast or 3D0) is through total sales, which is a terrible metric since the PS3 is the follow up to the PS2 and they could have called it the PSPooh and still sold more than either of those systems. This does not mean you cannot enjoy your Playstation 3; it's the only current gen system I still own. It just means the system is a financial disaster, and it would be great if we could just move on from that discussion because there isn't a great deal of wiggle room with the facts. The system is still fun regardless, just as one could argue that Dreamcast was still fun and enjoyable even though it was a financial disaster.