Some firsthand comments from an investor in some small medium Ontario businesses
- the minumum wage increase won't affect manufacturing business  . All minimum wage level jobs have been replaced  by robot/machines.  Remaining staff are highly skilled and paid accordingly.
- software/ bio medical    these businesses employ well paid engineers   etc
interestingly - these start ups rely on a network of "contract people" who work for fees and a chance to participate in a upside   -  bet some of those folks don't hit $15 hour 
- restaurant    this one is directly affected -  staffing is really not variable ,as you need ,who you need,  --   therefore cost increases will be passed to customer ( your lunch will go up 40-60 cents)   --- scheduling  particularily will be a nightmare and costly
the fear is that the industry will " submerge"   ,  go "cash under the table" with a group of workers who will be eager to accept
time to sell