Personally, the most interesting part is the cross-platform Playstation certification.
In a few years mobile phones will inevitably catch up in power to the NGP (especially being that Sony is using ARM and SGX cores). Sony fully knows this and anticipates it.
The point isn't to fight the mobile market, like Nintendo, its rather to integrate itself within it. When mobile phones do ultimately catch up, Android phones can gain have the ability to play NGP games much like the Xperia Play thru the "Playstation certified" process. As the specifications evolve on phones, what they are able to play will evolve with it. At first it'll be PS1, PSP games, later smart phones will play recompiled PS2 re-releases and NGP games. So we're seeing the specifications of the "Playstation" brand become more nebulous.
This is a unique niche that their competitors can't capitalize off of. Apple is heavily invested in the iOS, Microsoft in Windows Phone 7, Nintendo is too far removed from integrating its platform with smartphones due to its 3D screen and dual-screen platform.
Sony will benefit from getting its platform onto millions of Android devices (Android sells 5 million units a month). Phone makers benefit from having their device play Playstation games. Developers benefit from massive and persistent user base that spans beyond a single generational device from a single brand.
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