Those good prime lens i think cost less, and not to mention some L lens of canon like the 17-40mm which cost like 2k+ only, pair along with a 6k camera may still outperform that sony 35mm in terms of range, quality wise i also dunno how good this 35mm is but 17-40mm is a really good lens. Hey it got a L on it.
But the sony one is really tempting it looks like something the Fuji is doing. Got some kinda of MOJO in it. Make it look attractive just hope it could be around 5k instead of 8-9k.