Recognition of a user's geographic location has finally become common on websites. Despite the fact that this is a rather fascinating development, I'm finding it more and more irritating.
That aside, Google is doing a great job of taking advantage of geographic recognition by returning Google keyword advertisements that are specific to the user's location. That's great for everyone involved - higher relevance to users, better clicks for advertisers, and more money for Google.

However, I sincerely hope Google never changes their main search results to reflect geography unless users specifically pick a filter. (This is now possible at google.co.uk, .fr, etc...) Leave that to AOL.