Nope. Boeing ain't leaving Seattle now, or ever. There's too much infrastructure here.
As for the machinists... I find it disturbing that a bunch of pilots will stand around and criticize a labor group that voted to hold the line on compensation, after what we've collectively gone through in the last 20 years. Their contract wasn't even up for a few more years, and management wanted frozen pensions and a gutted payscale.
Boeing will move the 777X regardless of the vote outcome. The best you can do as a worker is full pay to the last day. Everyone yells about Pinnacle and PSA voting for cuts in favor of theoretical job security, but then anyone who holds the line is "stupid."