Too little, too late.
1) It gives them a huge library of premium titles. There are a lot of really good PSP titles which blow most iOS games out of the water.
2) It gives Android a premium, curated, and branded app store.
3) It should vastly cut down on device compatibility issues for developers. There's still going to be multiple devices (and resolutions), but at least you know a "PlayStation Certified" device will meet a certain minimum requirement.