Apparently the Apple TV has a similar feature, but of course it works within their software and not for the TV's directly, which seems to be what you are after.
I would have to shop around extensively I imagine, but could probably find a similar solution. Not sure what the price would be.
Conceivably with an external camera, infrared sensor, and some programming you could make a system that duplicates the original remotes' commands that allows for a near seamless effect.
If you replace the TV's menu with another interface the world is wide open to such things. I have a little atom based HDMI stick that I plug into my TV every once in a while. It has bluetooth, so pretty much everything works with it. Got a neat little qwerty keyboard...