I agree with your prognosis completely, and I think it will not just be Google, but all the big data troves out there, even NSA and such. It is just inevitable that on a long enough time scale, all data will either become public or fade away.

I think that there will be a new form of entertainment which will basically generate a soap opera-like experience from real lives based on aggregated camera data, recorded conversations, and the blanks filled in by guessing.

I've adapted a different strategy from you, however. I have accepted the new privacy terrain, and I lead my life as if someone is always watching, which means I try to be my best self at all times. :)