The mobility of the disabled and elderly. I do not think the future holds a scenario where people will be bed-ridden.
I feel that with assistant robots and advanced (small) personal transports people will be able to remain mobile and independent for much longer. If the society they live in is not too violent or corrupted, these people may also be able to be part of mainstream society. Robots on the factory floor Walking tall with robotic legs Hope for parents–robotic legs. Festo - Bionic Learning Network 2009. Rapid personal transports. Artificial limbs. Surgery & Medical Advances. Aims and Proposals. Jacque Fresco-Lecture-March 31, 2011 : The Venus Project.
Resource based economy "prison" would be like.