The futuristic vision of wireless domestic bliss that puts people and their smartphones or tablets at the centre of an Internet of Things is a key theme at this years IFA consumer electronics fair in Berlin. Industry titans such as Google, Samsung and Apple have been battling for an early lead in the race to create the Internet-connected household, a market they expect to grow into the next multi-billion-dollar tech revolution. The smart home is heading towards a mass-market reality, said Lisa Arrowsmith of market research firm IHS.