They could also double as underwater cameras!
Fujitsu couldn't help but catch my eye this year. While everyone was talking up performance, the Japanese firm had a long string of smartphones and tablets operating while they were submerged under water. To be clear, these are not dummy devices. They are fully functioning and are purposely designed to be waterproof/dustproof.
It's too bad that other manufacturers don't do offer the same level of engineering on their products. (My last Android phone fell victim to a recent thunderstorm while I was out running errands.) If every smartphone was waterproof, there probably would be far fewer durability complaints. That doesn't even begin to cover the fact that most manufacturers refuse to repair spill/water damage. Many premium laptop brands include liquid submersion indicators (LSI) so that technicians can rule a short-circuit by way of liquids as the original cause.