Samsung has two commercials airing currently with new forms of interaction ... might be the Galaxy S3 (I'm not sure). One example shows the user dismissing a call by speaking to the phone while a call is coming in. The other commercial shows that you can take a screen-shot by waving your hand over the device whenever - kind of ironic since screenshots from Android devices was always a pain back when I owned one.

Maybe they both work flawlessly - I don't know, but both seem like they could easily misfire when you intended to do something completely different with your device.