The smartphone is still the main hub of the Internet of Things and the market may be approaching somewhat of a saturation point. Smartphone makers shipped 334 million units during the first quarter of this year, but that's 10 million fewer than shipped in the same quarter last year.

Voice is becoming a widely used computer interface, but has yet to make the leap to participate in consumers' more significant activities. Only about a third of consumers use voice assistants daily to search for something they normally would use a search engine for, but only half of that (16%) use voice assistants to control other smart devices.