One day, finding an oven that just cooks food may be as tough as buying a TV that merely lets you change channels. Internet-connected "smarts" are creeping into cars, refrigerators, thermostats, toys and just about everything else in your home. CES 2019, the gadget show opening Tuesday in Las Vegas, will showcase many of these products, including an oven that coordinates your recipes and a toilet that flushes with a voice command. With every additional smart device in your home, companies are able to gather more details about your daily life. Some of that can be used to help advertisers target you — more precisely than they could with just the smartphone you carry. "It's decentralized surveillance," said Jeff Chester, executive director for the Center for Digital Democracy, a Washington-based…