This may have been noted elsewhere. For Nex too it seems.
From Zeiss blog:
New Family of Lenses for Mirrorless System Cameras | Camera Lens Blog
1. Three prime lenses are already in development: 2.8/12, 1.8/32 and 2.8/50 macro.
2. The lenses for the X-bayonet will come with a manual aperture setting.
Nice endorsement of the X-mount.