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.