I have heard of smart materials/metals that have a memory and can be restored to their original condition upon heating, if stress has deformed the structure of the metal. And Nano-paints that do not allow dirt to stick to a surface.
It would be nice if users had a screw driver that was made out of smart materials, so that anytime its tip has been deformed, the user could re-heat and fix the metal. But it is not necessary that consumers might be willing to pay a premium for such functionality.
Likewise, it is nice to have a SG5 that's waterproof and an LG G Flex 2 that can partially self-repair its surface. I agree, isolated these advancements are not a lot, and upgrading based on small increments are not feasible for consumers. But add another dozen of such improvements and theoretically, the world should have a new generation of smart phones.