Biggest Challenge in Connected Wearable Devices from market POV

Connected wearable devices are gadgets that are worn or attached to the body while being used and have the capability to connect and communicate. The device communicates either directly to the network through inbuilt connectivity capability or through other devices such as smartphone, tablet, or a PC. Some of the smart wearable devices available in the market are Google Glass, Samsung Gear, Moto 360, and Nike wristbands. These devices find their application in various sectors such as Fitness, Healthcare, Lifestyle, and Entertainment.

What will be the Market Trends, and Challenges for Connected Wearable Devices  in next 5 years?