“Starting out in the shallow end, IPS (Indoor Positioning System) would enable a whole new range of “real life analytics” apps. If you love how that Nike+ GPS app tracks your running speed and distance, an IPS version would blow your mind. IPS could track exactly how many steps you take and how many stairs you climb — and calculate, quite precisely, how many calories you burnt in the process. IPS could keep a perfect record of how many minutes you spend in the gym (and on which machines).”
via ExtremeTech » Think GPS is cool? IPS will blow your mind