Sony annual report has a special section on stacked image sensors. The stacked sensors are presented as the next evolution step, right after BSI:
Sony says "it focuses on introducing an era of “Super Reality” surpassing human vision, Sony will continue to lead the digital imaging world by ensuring the industry´s highest quality and most advance."
The first picture of a stacked sensor in comparison with other Sony products:
A nice graph showing Sony capacity expansion and future plans:
And two nice market size graphs:
Another Sony annual report pitch is the expanding the world of 4K video.
Update: As Imaging Resource reports, Olympus uses Sony sensor in its OM-D E-M5 DSLR - says something about Sony market adoption.