In organizing photos, grotagging is slowly moving towards center — it is becoming a key organizing mechanism for organizing photos. I recently bought a real serious camera with built in GPS — the Nikon Coolpix P6000 — and it is well known that most phone cameras soon will have geotags — latitude and logitudes — available. Since time was already available on photos, this makes photos relate to ‘events’ very easy. Combine this with inverse mapping feature — ‘What’s here?’ — of Google maps and you now have a potent mechanism to organize your photos.
Flickr mobile uses geortagging to show you pictures taken at newby places — a real nice feature for many tourists.