Jim Cramer reveals which sectors he believes will be the hottest in the new year. While biotech stocks have cooled off, Cramer believes that the general health care sector will continue to perform well in 2015 amid further consolidation and the Affordable Care Act, which he says is driving the industry and causing nearly all of health care to excel. Cramer also predicts a better housing market in 2015, provided the price of housing doesn't go up. But, he says it's what's happening inside homes that is particularly remarkable. He says home improvement companies like Home Depot, Lowe's, Sherwin-Williams and Masco are all doing incredibly well and that will be a theme that continues.