The A7rII is really a fantastic camera, however for what I do, I don't need all new features, but mostly the Liveview tethering and the Picture Profile. Do you think A7r can have these features with a firmware update, or is there a hardware limitation? Of course whether Sony wants to do it is another matter.
If I remember correctly, A7r used to have Liveview tethering with Capture One back when the firmware was 1.0.x, and somehow this get disable after firmware 2.0. This is quite a shitty move from Sony I have to say.