Surely if the cable was already conductive the issue of mass would be non-existent. I guess it depends on the properties of the magical cable that will make all this work.
Why would you not just use the cable itself to transfer the power rather than a complicated laser system?
Over 4 million PS2's sold in the US alone last year. I think that answers the question of will people buy a 9 year-old console.
A barrel roll in a passenger jet? You mean like this 707 doing a barrel roll... http://www.youtube.com/watch?v=-vHiYA6Dmws