If you have one of those dumb Sony Smart TVs you can use the remote for that to control your PS3 and I would assume your PS4. That's a solution, right?
Oh man, I have a Panasonic and that kind of a feature would be a godsend.
You might still be able to, we have a Panasonic home theatre sound system thingy and the tv can control that too. It's a specific hdmi cec thingy I think. Panasonic's version is Viera link.
Mine is a Viera! I'll give it a try this weekend.