One thing to remember: Just because a new generation of hardware is upon us doesn't mean the "old" consoles instantaneously die.
In order for publishers to continue making money, they really have to continue to release their games for the systems that have huge installed user bases. It's why you're seeing so many major cross-generation titles going into the PS4/Xbox One launches.
So, it's really no surprise to hear that Electronic Arts plans to continue to produce titles for the current generation of systems at least through 2017. Speaking at the Stifel 2013 Technology Conference in New York, EA CFO Blake Jorgensen made this plain . He also spoke about EA's exclusive "Star Wars" deal, which should prove lucrative for the publisher.
Don't forget how long we were seeing PS2 games after the PS3 came out. For at least three or four years, I believe. It takes time to build a user base that could result in appropriately high sales numbers for blockbuster franchises, ya know.