When good enough is good enough, enough.
When microwave ovens first became affordable, they sold very well as households jumped at the new technology. Then the market was saturated and the rush died. Permanently.
That's where we are at with many technologies. Existing laptop is good enough. Existing TV is good enough. Existing cell phone is good enough. Adding four side-facing cameras, fingerprint readers for all four fingers simultaneous, and making it one micron thick while reducing battery life by 50% doesn't entice us to buy a new one.
The point with the IoT "revolution" is that it's almost all incremental improvement. Nest and the like aren't fresh enough, conceptually, to cause an iPad-rush of purchasing.
Market personal anti-insect nanoclouds or clothing that safely administers stimulants/medication/intoxicants by suffusion through the skin and you'll get mega-rich.
Sherlock because I figured this all out in my mind-palace while on a 7% solution of cocaine, tripping out in the 1800s.