Now, consumer-electronics companies want to turn televisions into wireless gizmos. The trend began in Japan, and for the past few weeks, I’ve been test-driving the first model to hit U.S. shores, Sharp’s Wireless Aquos. Here’s how it works: Connect your cable and up to three other video sources — DVD, TiVo, and the like — to the Wireless Aquos base station. Turn it on, switch on the separate 15-inch LCD screen, and just like that, you’re watching wireless TV. No settings to futz with. It just works.