Egami spotted the second Sony patent describing a semitransparent mirror that can be locked up to get rid of the small light loss. But I still don’t know if that is going to be used by the future A77II or A99II successor cameras. What I know for sure is that in the mid-term Sony will get rid of the semitransparent mirror as soon as the A6000 hybrid AF system proves to be as good as the current SLT solution!
P.S.: A77II will be announced next week (May 1). Likely specs: 24MP, 11fps, Wifi, super fast af, $1200 price.