I do empathize with cdy. We're going to be at a point within the next five years where our devices have even more vectors for inputs. Right now it's largely text and location data, and location data is not even fully realized quite yet. Android is just now working geofencing into the core package. I mean the advantages for location data are quite obvious. If Google (just as an example) knows that you do all your grocery shopping at Kroger and Trader Joe's, tend to shop for clothes at certain stores (say Banana Republic), frequent golf clubs, etc.; they can create a more full picture of you as a consumer. That information can be made to infer relative disposable income, habits and brand preferences, etc.
The vectors beyond that - voice, vision (if wearable takes off), and biofeedback - I am really uncomfortable with the idea of freeing up the use of that information for third parties. There's a certain point where it's no longer convenient for me.
I am interested to read Scoble's perspective on this when his book comes out. It's true that this level of contextualization should, hypothetically, make our lives much simpler. But then he starts talking about "not need to make unnecessary decisions," and I'm creeped out.