Up to Date. A Philadelphia builder advertises that all houses he is erecting are being wired for radio telephone service. That starts a lot of talk. Nothing Americans like more than a thing with the latest improvements. A few years hence prospective tenants, after inspecting a house, will say: "Plenty of closet room, a large bath, good plumbing, everything convenient. You have, of course, an airplane landing on the roof?" Airplanes soon will take off by rising straight up in the air. Airplane landings on house roofs will be as common as garages are now.