Building upon Athletic Performance Technology's potential application to the needs of the elderly, most commenters directly or peripherally referenced 'wearable tech' and this seems to be the fertile ground where both interest and opportunity lie.
However far from the Singularity we really are in practicality, there seems to be the emergence of some early gateway technologies - what I would call something like 'soft augmentations', which may ultimately build a bridge between here and there, normalising the merging of our biology with man made technology via Wearable Tech.
Move - Pilates Smart-Garment
Apple iWatch - probable this year
Google Glass - available this year
Nike Fuel Band - movement monitor
Modwells: Personal Modules for Wellness c/o Artefact
How might your idea scale and spread to reach as many people as possible?
Does the urgency of their need, multiplied by their access to a lifetime of accumulated wealth, make the elderly the natural early-adopter market for the myriad emerging wearable technologies ?
How might your idea attract and involve partners from health care, business, government, nonprofit or other sectors?
As with the earlier iteration of applying existing athletic performance-wear to the needs of the elderly, it would seem that this demographic represents an abundant opportunity for the many companies already well down the development track in this field.
How might you design an early experiment or prototype to further develop your idea?
Once again, with the technology itself already well into development, the challenge is probably more so in defining how the benefits might best be applied to the elderly's needs and what factors would convince the elderly on mass to embrace these solutions.