Part of the problem here is that virtually everyone on this site sees the PS3 as a game console. And no game console has yet to sell 150 million units.
There isn't a market for 300 million Wiis. If you believe that, that's all well, but simple enthusiasm hardly makes it so.
But there is a market for 150 upscale optical media players. Or in the future, 150 set top boxes that deliver DD content to consumers. Or both in one box.
As a console alone 150 is extremely unlikely, but apparently Sony's long term strategy does not rely entirely upon selling games alone. I thought the inclusion of Blu-Ray alone made that fairly clear.
MS appears to have a similar strategy in mind as well between their own DD service, online gaming and media hub concept.