These are the buzzwords of 2013, sensors, mobile, fitness and wellness, Internet of Things, Big Data. But those are not just buzzwords, it is all getting concrete and real.
Hardware and software will fuse to create new interesting services and experiences.

A few examples:

• Tinkė an iPhone accessory that measures heart rate, blood oxygen level, respiratory rate, heart rate variability
• CitySense, a smartphone accessory to monitor pollution
• iSpO2 Pulse Oximeter, an iPhone accessory to measure blood oxygen and pulse rate
• Withings Activity Tracker to monitor steps, heart rate, sleep
• Your Android Phone Could Help Scientists Predict Your Weather, smartphones and barometric pressure sensors

Others mentioned in previous posts:

• Hardware is the new software
•  Smart Body, Smart World: The Next Phase of Personal Computing.
•  smartphones, sensors and the future of medicine
• The smartphone revolution
• Profits come from selling hardware AND software