Agreed. It's a shame but I don't think developers dare take a risk with new IP when they can churn out Call of Duty 19 and FIFA 13 which they know will sell by the bucketload.
I'd like to see someone do something genuinely interesting with the FPS genre in particular. Case in point - Mirrors Edge. For all it's flaws (in fact it's main flaws were exposed when it tried to conform to the usual FPS tropes) I thought it was a cracking game that tried to do something different but unfortunately didn't sell as well as expected.