In a sign of the times, Sony dropped the 3D mode and replaced the single Memory Recall slot (which led to 3 settings) with individual slots for each group of settings. Definite win. It also incorporates the new multi-interface hot shoe as part of Sony's phasing out of the old Konica-Minolta shoe.
The back control buttons are less bulbous looking that before, and the help button's been replaced with a programmable control. Also, that Phone icon near the Function button, for Wi-Fi connections, used to provide manual image rotation.