NFC sensor or GPS coordinate, the cloud-based system takes the liberty of pushing location-relevant apps to your phone or tablet. Enter a museum, for example, and you'll automatically receive its tour guide app. Your device could even be made to work as a viral transmitter, spreading the app to other visitors' handsets. Finally, when you leave, all the bloatware just magically disappears. Alternatively, the museum's marketing department conveniently forgets to configure this last step, accidentally signs you up to its newsletter and grabs a donation from your PayPal account while it has the chance. We would obviously find this rather upsetting, unless the museum has dinosaurs.