Homes, cars and phones slowly linking up

Chat by video on multiple screens as you stroll around your house. Start a game on your living room TV and finish it on your car entertainment system. Automobiles, phones, TVs and home appliances that talk to each other is a future technology companies have envisioned for a long time. And bit by bit, it is starting to happen. Silicon Valley insiders are zeroing in on new ways to let people share media across different gadgets and make it safer to manage your locks and alarm systems over your iPhone.