Not really an emerging technology, but I really like this product (portable LCD monitor) because in the past the demand for this just wasn't there. To have an easily portable monitor is a legitimately sought after nowadays.
LithiumCard - This backup power supply for your phone is the size of a credit card. Linear Flux’s new LithiumCard portable charger connects via Micro-USB to “hypercharge” your phone. That means it charges fast. via Werd