It’s a good solution, but if it’s going to be in the engine it’s got to be viable for most platforms too.
I imagine we’ll get MSAA at some point, though - or something on par. There’s also the option right now to get the nVidia Gameworks-builds of the engine, and you could try the new (900-series specific) anti-aliasing that they’ve been working on. It’s specific to the new 970 & 980 cards though IIRC.