If I can ask my phone where I lost my keys, and it tells me where they are because of this technology, then that is awesome.
The only people that should be afraid of Google (and the NSA) information gathering are terrorists and pedophiles, so if you don't count yourself part of either or those groups there is nothing to worry about.
But honestly there must be a lot of pedophiles and terrorists out there the way people always complain about this stuff.
Tell that to the Jews, gypsies and gays prior to WW2... Or motorcycle club members in Qld Australia right now.