The whole home automation market is so new and small yet, there are going to be all sorts of changes and clashes in the next few years as companies bring out new devices and services. That's why Google snatched up Nest Labs and worked it into its re-org - there's a huge untapped market there and it is going to take awhile for any sort of market leader, standards and so forth to come about. Right now I think a lot of companies think if they can get in and establish a proprietary based technology, they can grab a market share. But like any new and emerging market, it will be tough for consumers for awhile at least as standards will change and competition will be fierce.
I will say for right now, I do think Apple's Home Kit system has the edge in terms of strong security (Home Kit requires full end to end encryption on all communications between all devices). But that also means device designers have to go through a more involved device certification to get Home Kit compatible since it is an Apple proprietary technology.