Chris Gampat, The Phoblographer:
At a recent media excursion with Sony, we were given a presentation on how their sensor stabilization works. For starters, Sony stated that it needed to develop a brand new system independent of Olympus’s for many reasons–but the most notable reason has to do with the fact that Olympus’s system was developed for the Micro Four Thirds world. Sony’s would need to be developed for a full frame system and in order to do this, the company pulled engineers from many parts of its company to develop the technology.
Stabilizing a full frame sensor takes a lot more work than it would for a Four Thirds sensor–and that’s why Sony developed the system that they did.