Well, sunny beaches - Seattle's minimum wage hike has been somewhat less rosy than imagined by proponents, although at present it has not been as disastrous as opponents suggested. To date, the results are...ambiguous.
"We had some ambiguous impacts on earnings," researcher Mark Long, a professor of public policy and governance at the University of Washington, tells The Christian Science Monitor. "That's not surprising because, while we're finding their hourly wage rate is going up, if their hours are being cut, then the net effect on their earnings... would be ambiguous."
In other words, give it time to kick all the way in. There's little question that employers that choose to remain in the city will cut employee hours further wherever possible, which will essentially negate any positive influence upon overall employee earnings. They'll get paid more, but work less, so there won't be any net gain in income for most of those folks, regardless of the desires of "progressive" politicians who really should stick to shucking and jiving and glad-handing rather than attempting to dictate how business markets should work.