m2m is significaly usable in healthcare in my opinion will play more important role more then elsewhere. it's not only because of easy monitoring but because of smart grid these sensors can create. At the moment some researches says that there are already 2.8 million patients monitored today!!
http://www.m2mnow.biz/2013/01/15/9645-berg-insight-says-2-8-million-patients-are-remotely-monitored-today/ i think we are at the very bottom of the exponential growth in the next 3- 5 years