Great points. I'm personally tying to avoid Google services as much as possible, but I guess I was thinking in a more general context. Even so, your points still stand. (Small obligatory remark: incognito is entirely client side.)

The silver lining might be, considering your ISP can now access your data, that maybe the culture will shift and people will take online privacy a little more seriously, both applicastion and services providers and users. Maybe people will stop sending user analytics in plain text all the time. Maybe people will expect tls everywhere. Maybe a layer 3.5 overnet will emerge..