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using magnetism is... not ideal lol.  you'll have to have a limited amount of electronics near your person for it to work right.  building built with steel reinforcing will make it so it plainly doesnt work, not to mention computers, lights, tvs, gaming consoles will all warp the magnetic field, and if the magnetic field is strong enough will kill said hardware with extended use

also, magnets cant provide linear motion in a wide range, but before i condemn it i want to see one work wirelessly,  with the wires the magnetism can totally take a backseat and a lot of these problems wont be as big, but i still wouldnt use it :P  using the wrong cleaning products which uses static magnetism will damage your electronics after only a few uses