Dell Ideastrom has this excellent suggestion: Standardize Power Cables for Laptops
This will be so cool! You don’t need to worry if you forgot to carry your laptop power cord, hotels/airlines can have direct supply for laptop power and the convenience will be amazing.
Its also necessary to standardise on the power adaptors for other devices. The good news Cellphones will have stand power adaptors by 2012. This has been agreed at GSMA 2009 by Nokia, Motorola, LG, Samsung, and Sony Ericsson. They will use the micro USB port as the standard. Can’t wait for this to happen! Apparently this move will good for the environment as they will save tons on adaptors as they can now be re-cycled.