It would be nice that on cars the brake lights were split into three segments, contained three different bulbs or increased in intensity depending on how hard someone is breaking.
So that if someone is lightly on the break the break lights will be quiet mild in brightness and the harder someone is braking the brighter the light to inform the people behind.
A new way of delivering information to a phone would be to have a barcode that streams information in binary form - this means you could point your phone at a video and the phone would capture the binary (or another method) to actually receive the information directly, say an app or other information.
It may not even need to be a video but it could be a GIF or even flash format.
Often I see "for sale" signs or "to let" signs in the street but I just want instant details about the place. These signs should have QR codes so that you can scan it with your phone and find the details instantly.
Please someone invent a piece of polarised film I can put over my phone screen so I can actually read the damn thing in day light!
I have never understood why Sony haven't done this yet, but they should create a PSP that doubles as a phone. With built in 3G it would be the best of both Worlds and allow for mobile multi-player with awesome high quality games.
