As I understand it, the 80gb model is going to switch to software emulation of legacy titles, presumably to save money, and the extra 20 gb + a pack-in aren't substantial cost increases. They might even be spending less total on this new package than on the old 60gb model, which means less loss per unit.
They're kind of between a rock and a hard place, and this is shifting sideways. They offer a little more (superficially) for the same money, (probably) lose less per sale, get some gains from the 60gb fire sale, and hold out hope that in the long run, gamer's demands for power in an increasingly HD world draw them in and some future games demonstrate that the PS3 can do it better than any other. In the meantime, PSP and PS2 redesigns to increase sales and decrease costs respectively. They don't have tons of other options.
I still anticipate a real price cut this year. Microsoft actually discussed the need for a lower 360 price point recently, indicating that with their lower chip costs, it's on the brain. When it does happen (holiday time), that's going to pressure PS3 to follow just to stand still.