PSP dead? No, look at December NPD sales

I'll let the numbers speak for themselves:

Nintendo DS: 1.6 million
PlayStation 2: 1.4 million
Xbox 360: 1.1 million
PlayStation Portable: 0.95 million
Game Boy Advance: 0.85 million
Wii: 0.60 million
PlayStation 3: 0.49 million

This is failing? Although the PSP doesn't sell as well as the Nintendo DS, it's still quite a viable platform. With games like Metal Gear Solid: Portable Ops available exclusively on the system, why wouldn't people want to pick one up?

[Via IGN]