The Smart Home market has been "the next big thing" for over 30 years now, and anyone who says it's about to become mainstream is either drinking the Kool Aid or smoking some weird stuff, cause that's still years away. One issue is developers putting technology in places where it's not needed. See http://www.mhealthtalk.com/smart-refrigerator/
Another issue is standards. While companies hype their IoT technology as if it were already a booming market, it’s not really. That’s because the Things don’t speak the same language. Manufacturers of Things live in different market silos and see the world differently, some needing high bandwidth, others needing long battery life, and still others wanting real-time communication or not needing to communicate beyond their silo at all. That leads to different decision criteria among constantly changing technologies and protocols. No wonder one developer picks Wi-Fi for wireless connectivity while others pick ANT+, Bluetooth, Zigbee, or Z-Wave, and others use wired connections.
What’s needed is a gateway — some sort of device or service to interface between remote monitoring services and in-home (or mobile) medical & environmental sensors using different networking standards. Will that be a PC, tablet, smartphone, TV set-top box (e.g. AppleTV), or a specialized device? There’s likely no one answer and the choice may depend on the need to interoperate with other subsystems, including home security, HVAC, lighting, surveillance, electronic door locks, medical devices, etc. Smartphones and tablets already serve as health gateways, because they support cellular networks, Wi-Fi and Bluetooth. If you’ve followed me on Modern Health Talk, you know that I’m an advocate of using a smartphone or tablet as a health gateway.
The biggest issue of all may be marketing and how to show the value proposition, since no retailer is setup to do that. Whether it’s BestBuy, Lowes, or Home Depot, appliances are in one part of the store and PCs, phones, window treatments, wiring & networking products, lighting, HVAC, security, and other connectable products are sprinkled elsewhere — i.e. no place to see it all working together. By introducing using AppleWatch, iPhone & iPad to control just one Philips Hue lightbulb, Apple can also ease consumers into a DIY installation that may next include the thermostat. And after that, what next? (http://www.mhealthtalk.com/apple-to-enter-home-automation-market/