Sony's strategy is always selling hardware at a loss, but relying on software to bring profitability to the products.
I suppose we all agree that Sony is selling the PS3 Slim at a loss. Since PS3 sales has improved a lot lately, it is logical to assume that Sony is losing more money than before. To compensate for this loss due to increased hardware sale, the software will probably have to sell a lot more. However, at this moment, the software growth is lot slower than hardware growth, which is normal. In fact, we may be not see software catching up to the install base in another few months to a year at the very least. Thus, before that happens, the PS3 product line will most likely stay in the red.
This, couple with the failure of PSP Go and declining hardware / software sales of PS2 and PSP, will probably create huge quarterly loss for Sony, at least until Sony can bring the PS3 production cost further down, or PS3 software sales catches up to its install base.
The software sales increase of Wii / XBOX360 relatively to their hardware sales is irrelevant, as Nintendo and Microsoft are already making money from their hardware. Sony, on the other hand, has a completely different business model.