As we went to press, the annual Consumer Electronics Show (CES) in Las Vegas was in full swing. In advance, it was looking to develop into a slugfest between Amazon and Google in the smart home market, as the rest of the industry adapts to their lead. That will only increase the tension between the operators which want to make a smart home-as-a-service (SHaaS) play, and the off-the-shelf DIY direct-to-consumer approach. Google apparently has triple the floor space it did last year. Amazon announced that its Alexa Guard feature was now live for US Echo owners. The feature acts as a security alarm of sorts, and will listen out for the noise of broken glass, for an indication of a…