I would personally rather have a high quality USB camera that locks onto the device for video chat than a crappy bezel cam.
Will there'd ever be a bezel cam? Maybe, but not likely. I say this because one of the big selling points apple made on the iPad is that it fits to you, so you can hold it however you want....adding a bezel cam forces you to hold it portrait, which would be horrible for video chat. If you had a camera that plugged in or better yet Bluetooth you could use the device however you want and just place the camera wherever you want.
I don't know if I agree. I'm sure any front facing chat camera would have some sort of facial recognition software so it can track your face.