[Andrew]

Fontmedia - the kind of location awareness that you're describing has limited benefit, because we can't run in the background. So if we added that feature, you would have to leave OmniFocus running all the time (switching back to it immediately after using any other app, etc). In addition, location requests are quite expensive - if we constantly monitored the location, your phone battery would die quite quickly.

Maybe it's something that will become feasible in the future (I agree that it's obvious how useful it would be), but not for now.