Very little improvement in hearing aide technology is possible "right now". Yes their controls and sizes have "vastly improved" along with the life span of the battery, what fails is the ability to "tune out" those sounds one doesn't need amplified (like the sound of rustling paper) and to increase the volume of sounds we need to hear (like the low voice of a quiet talker). Hearing aides are still "simple" amplifiers. Now days they can "fine tune" the volume of the "ranges" of hearing (one does not lose their hearing across all ranges), however there are not effective programs that can quickly pick out those sounds one would like to hear over the sounds one doesn't want to hear. The programs exist, however they require a much larger system (more hardware) to run, something that common hearing aide sizes can not, presently, hold. As programing improves and more advances are made in the nano and micro-micro-chip field advances will take place in the hearing aide industry. Like I said the technologies already exist, however the issue is marrying them together to make an instrument small enough and complex enough to perform these sorts of functions.