We could be saying goodbye to our power cables and AC adapaters soon! DSP Design from the UK reports that they have designed a laptop entirely powered over an Ethernet cable. The Poet 6000 draws only 12 watts, all through its Ethernet connection, by relying on low power components.
POE or Power-over-Ethernet uses an ethernet cable to transmit power down to the computer up to an upper limit of 15.4 watts. But a new specification called Power Over Ethernet Plus will increase that up to 35 watts, which would be sufficient to power some notebooks.
Source: www.engadget.com