What if we could paint augmented reality boxes on sports fields in the way we put sponsor logos on the pitch?
Spectators could use smartphones to get live video content on their devices by just pointing their cameras at the box. This content could include action replays, commercials or even promotions.
What if trains could disconnect in motion?
Imagine a subway line with x number of stops. Now imagine trains in that line had equal number of cars. Each car was labelled with a different stop on that line, in sequence, with the first stop being the last car.
As the train speeds across the line the cars disconnect from behind in sequence with their own braking system to stop at the stop of their designation.
This means every passenger has only one stop per line greatly speeding up their journey.
I’ve had this Minority Report style vision of somebody arriving home, pouring themselves a drink, plonking down on a couch and watching a big screen of his friends’ twitter updates. Which naturally made me think that Twitter in screensavers would a be a good idea.
Obviously this cannot be a new idea. A quick Google reveals the obvious (D’oh).
But still, I think the concept can be pushed if enhanced by beautiful design. Tweets appearing coloured bubbles according to the emotion contained within, or the friend’s gender or relationship to you.
Could also be an amazing installation at a party. Get people’s twitter feeds up in a club or other venue and people can communicate across a room. People could even wear their twitter names on T-shirts to facilitate flirting 
Wordle.net could generate amazing covers for real-life books, if the entire text was pasted into its processor.
Passengers flying long-haul flights are normally requested to fasten their seatbelts over blankets, so that crew can see that they are fastened, in case the aircraft enters turbelence after the passenger has fallen asleep. This is to prevent them from having to wake up anybody to check whether the belt has indeed been fastened.
It would be so much more convenient for the airline and comfortable for the passenger, if seats are fitted with simple illuminators that light up when the belts are fastened. So a visual inspection of the seat will reveal if the belts is fastened under the blanket or not.
