The objective of AAL and home care is a better care for frail individuals (elderly chronic and disabled patients) in a home care setting. In principle it means to allow the citizens to stay at home as long as possible, delaying the institutionalization of people, possibly avoiding it for a high percentage of them. Recent development in ICT shows that it is almost impossible to design and implement an AAL system as fixed to certain hardware, operating system, and infrastructure. Thus it is necessary to develop such architectures that will be easily extensible and modifiable. We will discuss such approaches in the chapter. We will also analyze the social, legal and ethical issues connected with the technology issues.