According to the NPD Group, slow cooker usage is expected to grow by 16 percent over the next 10 years, while grilling will increase 11 percent, reports Supermarket News. NPD's "A Look Into the Future of Eating" report notes that stove tops and microwaves will continue to be the most common appliances used in meal preparation, and "Just as it has done over the last three decades, the need for convenience in meal preparation will continue to grow over the next decade,&