So-called connected homes, which feature a network of devices and appliances that communicate with each other and can be remotely monitored and controlled, are becoming increasingly popular and affordable. By 2020, the connected home market could be worth nearly 150 billion globally, according to professional services firm PricewaterhouseCoopers. Most Americans surveyed by the company said that within the next decade, using a single remote to control everything in the home will be the norm. "Younger generations view these devices as adding to the livability of the home," said Mark Lesswing, chief technology officer for the National Assn. of Realtors trade group. "They're early adopters now, but in three years, I think this becomes the norm."