Oh cool another random concept rendering that may or may not have any relation to anything real at all. Thanks.
It's a concept. It's never going to happen and look like this.
The dongle is too wide and will block other HDMI ports. Fail.
The current aTV wants to be visible for the IR controller.
I expect Apple would want their addition to your setup to be quite noticeable, like "Hey, look, there's an Apple product plugged into this TV."
How dare a company that isn't Apple make a concept product that's too wide. Silly German überpfail.
Then why is the current Apple TV small, black, and indistinguishable?