It has been recently announced that newer USB cables that used the USB 2.0 and 3.0 technology should be able to supply a whole 100 watts of power, which is enough to power a computer. You read correctly: you could be able to charge a laptop via USB! It was decided that new USB cables in production will be able to carry enough to power the brightest light bulb possible. It makes you think about how much we can take the USB technology for granted, as we use USB ports in our myriad of devices to charge a variety of gadgets almost as much as our wall outlets. Pretty soon, it will be possible that this could be a universal laptop charging solution; or a universal charging solution in general. WANT!
However, as with most new technological advancements, it won’t be as simple as just plugging any high-power USB cable into any USB port. As mentioned earlier, only future (not current) hardware will support this newer high-power function, as it will also send power both ways, ramp data delivery up or down, and work with devices sporting older USB power specifications. Fortunately, it has built-in intelligence to be able to check and make sure the devices at each end—including the cable—are capable of supporting 100 watts of power.
Having the patience for the newer cables aside, once USB technology is capable of delivering that kind of power, there’s no good — or even valid — reason for companies making newer devices to still use their own weird proprietary connector. Did you hear that Sony and Apple?