Theory behind this technology was developed in the 1890s by Nikola Tesla, who managed to transmit 100 million volts of high-frequency electric power wirelessly over a distance of 26 miles at which he lit up a bank of 200 light bulbs and ran one electric motor! He claimed that only 5% of the energy was lost in the process.
I am unaware of the difficulties regarding this process, but I believe that after all those years, our homes should already be free of much of their wired equipments. Currently there is a Consortium integrated by many of the most important manufacturers of home electrical such as Phillips, Nokia, Olympus and Siemens, aiming at delivering specifications for a standard for wireless energy transfer.
Some wireless powered appliances are coming slowly to commercial releases. And you can see some of them here: Wireless Power Consortium Webpage
However, I fear that I will still take some time before we can arrive home and automatically all of our appliances will start charging.
