So I just got a shiny brand new PS4 and it's all exciting. And my PS3 will likely still be around, but it may get relegated to the second room, which means I'd love to be able to use my PS4 for Netflix and the like. Will my PS3 remote work on my PS4?
Sadly the PS3 Media Remote will not work with the PS4.
The PS4 Media Remote, while being "official" and endorsed by Sony, is a very poor substitute for the PS3 version. It does not allow for volume punch-through for an amp, contrary to what the manual says. It could not switch inputs on my SONY amp, which is mind boggling.
Avoid the PS4 Media Remote. You're better off using the included controller.
No, a PS3 bluetooth remote will not work on the PS4.
However, in October 2015, a PS4 remote was produced and the functionality is similar to the PS3 remote.
You can find them on Amazon or a number of other shops that carry Sony products.