Serafina, Barbie's "life-size" cat companion, is an RFID-equipped plush doll that speaks 75 phrases in response to cues embedded in Serafina audio CDs and the Barbie DVD The Princess and the Pauper. Serafina also sings, meows, purrs, wags her tail, and tosses her head. She also looks a little homicidal, I think I'm going to have nightmares.
Serafina is one of many new toys that will interact with tv shows and movies.

The Batwave TV-activated Batmobile responds to cues in the animated The Batman series.
When the Batlink is attached to the Batmobile, the vehicle reacts to action on the TV screen with transformations, lights and sounds. The Batmobile has a speaker and holds one figure. With the removable Batlink, kids can hear secret messages from Batman and download villains, weapons and upgraded Batmobile features from the TV. Later, those can be used in customizable adventures, Batman missions, and much more!

From the Washington Post.