Apple didn't revolutionize power supplies; new transistors did
Tangential: when I saw the iPhone power supply, I was blown away. Here was this little white box, about 1-inch cube, able to convert 120V AC into low-voltage DC. No tranformer; no big capacitors; nothing. Just some solid-state electronics, and bam! Out comes some sweet DC juice.<p>I wish all DC equipment came with such power supplies. Heck, while I'm at it: here's a great idea. Establish 2-way communication with the solid-state power supply, so that the equipment can tell the power supply what it wants, and the solid-state supply can then give it out. Then you won't need a separate power supply for every piece of equipment!