No sooner has someone threatened to take away the cable advantage in broadband (see article on Sckipio’s new G.fast over coax implementation) than cable is threatening to make a comeback. Could it be that both sides of the equation are now fully conversant with each other’s moves and one another’s problems, and are always planning their next step with one eye on the rivals. The Sckipio product this week promises a breakthrough for telcos, and relies on the fact that cable has a hard wired asymmetry, and it is considered impossible to offer two-way communication over cable at equal speeds. Which is perhaps why Nokia’s Bell Labs, this week, has explained how it has implemented two-way cable, at speeds up…