A number of companies are trying to upend how health care will be delivered.  CVS wants to buy Aetna, CIGNA wants to buy Express Scripts, major companies are combining their efforts.  In the midst of all this, insiders such as Bernard Tyson (CEO of Kaiser Permanente) have said that the boundaries of health care are changing as organizations move into new lines of business.  Health insurers are acquiring medical practices, hospitals are getting into the generic drug business, and large tech companies are looking to disrupt health care…with more going home for care rather than being put away.