I really liked the 4xSMAA option Crysis 3 had, but it used MSAA to some extent, so I guess it's more work than it's worth to implement.
https://twitter.com/CRYTEK_TIAGO/status/306447856473092096
Hmmm, sounds odd. Now the question is; does SMAA native require that much work or is it purely a CE design thing.
Then again, TXAA works exactly the same way; requiring a native implementation and it's pretty hard to backwards implement that -- Might be that he's referring to.