Good thread, I didn't remember all the details anymore (and I'm not sure I ever had enough information on temporal AA anyway).
SMAA is subjectively better than FXAA, and is only a slight bit slower.
I recommend giving it a shot.
Both methods have almost zero impact on PCs (consoles too, but they don't often get a say in the matter).
Temporal AA is cool, but is has too many downsides in the implementations I have seen.
Hopefully some day in the future we can get a smarter, more accurate method of doing it.
Developers could probably devise a method that uses it only in slower scenes, or on select portions of the screen.
Adaptive Temporal Anti-Aliasing, sounds pretty cool.