Now, here's something really exciting.   It's rare that you get a technology that might truly change the world in one fell swoop, but if there ever was one -- this is it .   Of course, scientists always posit theoretical applications of their work that never really come down to practice, but if these MIT eggheads really are right, we're approaching a world with no wires at all.   Could be a major step toward making that XBOX even more portable than before!