The cameras seemingly offer all the controls an experienced photographer would want, including three adjustment dials, a dedicated exposure-compensation dial, and nine programmable buttons that can be associated with one of 46 operations. The user interface is also improved over the NEX experience, with a combination of Sony's Quick Navi control panel operation and more a streamlined version of the NEX menus. The EVF is quite nice.
Although Sony introduced the full-frame E-mount VG-900 camcorder a year ago, we're finally seeing the debut of the Full E-mount (FE) lenses, which are actually designed for the full-frame cameras. The mount still accommodates standard E-mount lenses, though your choices are to crop to 10mp (A7) and 15mp (A7R) or retain the vignetting. This is the new 28-70mm f3.5-5.6 FE kit lens.
The cameras are much bulkier than standard compact digital cameras, or indeed Sony's interchangeable lens NEX cameras. They're the smallest interchangeable lens cameras with a full-frame sensor, though.