Honestly I don't see myself using it. I got an iPhone recently and it satisfies my on the go gaming needs, and I don't want to have a second bulky device in my pocket solely for games.
My phone can't play console quality games but...that's what my console at home is for.
Platinums: Red Dead Redemption, Killzone 2, LittleBigPlanet, Terminator Salvation, Uncharted 1, inFamous Second Son, Rocket League