I have to say, one universal connector for everything is unlikely, and probably hard to do.
More likely, could be several classes of adapters.
PDAs
Phones
Laptops
Cameras
Game systems
Music players
Instead of a different connector for every make or model, we'd be down to only 6 connectors, all exchangeable. Of course, this is unlikely, seeing how manufacturers like to make money off proprietary adapters and accessories.
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