My opinion as a biomedical engineer is that there is a lack of exposure of these real problems because, really, how many people know someone with Parkinsons? But when companies like this solve them in such an elegant way they can appear pretty cool and dare I say "sexy".
So its an obvious solution, but I wouldn't say its an obvious problem. The list of problems is probably huge and a forum for capable engineers and designers to browse and help solve them would be awesome.