only one negative point of this camera is the poor video codec AVCHD and lack of ML.
I am definitely getting the A7 , not the A7R ,which has very poor AF(I tried it at Sony dealers meeting here).
Oh and, the 55mm f1.8 is an incredibly sharp prime, and the 70-200mmf4 is a bit better optically than the EF70-200mmf4LIS or Nikon AFS70-200mm f4VR.
the main reason why I personally avoid the R version is that the R has very slow AF (identical to the AF of the NEX7), the Alpha 7 has PDAF , not as fast as that of the A99v but close.
however, if you can wait , wait till Feb, you will be shocked to see the New Alpha 9 , which will have 4k video with in body SSS, and very very fast PDAF to fully optimize it.
so wait till next CES