Did everyone suddenly stop using facebook because a few vocal people worried about privacy a month or so back? nope. Most people just don't care one bit.
I'm really excited about all the fun things we'll be able to do and have.
I wonder how long it'll be before we're all wearing augmented reality visors/goggles bluetoothed to your smartphone with useful advertising/help/wiki etc. You could be walking down the street and an advert shows above a cafe saying "half off coffee today". It could show you customer ratings etc.
You could walk up to your friend, the goggles/smartphone would recognize their face as being your friend, analyze their emotions, show you their details next to their face and so on.
Having the future we want means we have to allow people access to some information, like 'where we are', where we've been, messages, demographics etc. Either you get cool stuff, or you get privacy - up to you.