These days, casual game developers should be able to pick a cross platform SDK to write/port games between PS3/360/WiiU, PC and mobile platforms. e.g., Plants vs Zombies was ported to all of them.
That's why Sony invested in PS Mobile as well as native SDKs for the home consoles, plus SOE and Gaikai. They don't really stick to just one gaming platform.
EDIT: Ugh, I forgot about Vita.
That's why Sony invested in PS Mobile as well as native SDKs for the home consoles, plus SOE and Gaikai. They don't really stick to just one gaming platform.
EDIT: Ugh, I forgot about Vita.