i don't think the ps3 is doomed. I'm no expert or anything but the way i see it, they will lose some money with it maybe... then again, we don't know what to expect in the long run, i mean DSs are still selling like crazy and it's been released so long ago (starting the timeline from phat).
Sony announced a price drop so, even if still expensive, will be set to a more reasonnable pricelet's bet something around the 500$, wich is nothing, i remember buying a saturn at that price when i was young, and things were cheaper back then.
Also never underestimate sony,they always seem to come up with the killer app that everyone wants or makes the console special, like the MGS series of course, the FF (even if they seem to be going back to their old friend nintendo more and more lately) series, and games like Shadow of the Colossus.