New rumors suggest that the Sony A77 will be getting refresh around the first of the year. Interestingly though, the A77 replacement is expected to include no mirror at all.
While the A77 make the most of Sony’s SLT technology, apparently the loss of light transmission through the pellicle mirror is detrimental enough that Sony is moving to a completely mirrorless design. I would expect some advanced AF sensors that still use phase detection on the image sensor itself. Sony has made fast AF on mirrorless cameras an expectation throughout the class with its NEX-6 and NEX-7 models. However, a step this huge to a semi-pro DSLR-ish system means that there is no room for compromise.
As a giant consumer electronics company, Sony has continued to surprise us with innovation after innovation in the digital camera markets. I’m really looking forward to seeing how these rumors pan out and what Sony has up its sleeve. I would expect an announcement for early 2014 to be made at CES 2014 in January.