“I come here to think.
I love this part of the city. I always have.
When I come here, this time of night, it’s perfectly quiet apart from the sweepers. Their little robot bug-eyes just see me as a warm blob and steer clear.
I’m glad. I come here to think, and relax – not quiet ready to go home yet, not quite ready to sleep.
It’s the busiest, brassiest square in the North is Big Market. But it’s quiet now.
Idly, I flip my phone open. Warm blinks researched for the right combination of friendly frequency and companionable colour tell me my friends were here earlier. I gesture my phone in the air like a wizard in a children book, and the blurred drunk pictures they took of themselves just a few hours ago appear.
I remember as a kid watching David Attenborough tell me about Africa – and how the rhinos could smell better than they saw, and so their friends and lovers appeared in their mind’s eye as week-long scent trails, reassuringly ‘there’ even when physically long past.
Here I am, with my phone, seeing the city like Rhinos see. I come here to think.”
GPS, digital cameras and phones will combine to let people annotate the places around them – fixing pictures and information in space and time, and sharing that specific instance of experience with their friends.
Petafloptimism 
What’s the phrase – with technology, less changes in 2 years than you’d expect, but in 10 years far far more has changed than you could ever imagine…
This scenario is doable pretty much right now – the pieces are there, the wind is right, the forces are converging. I’d expect this in <2 years, and to be moving towards the mass market in 5.
Two parts that are worth exploring – “Idly, I flip my phone open.” (will you really be doing this in 2013?)and “reassuringly ‘there’ even when physically long past” (virtual emotion connection)
perhaps using the word “flip” to refer to initiating use of your phone will be by then more metaphor than literal description, a reassuring reminder of a time when phones needed a physical action to start using them. Maybe it’s similar to Gibson’s “jacking in” to the Net, or Windows using the metaphor of a desktop?
poetry