This is nothing but a win for Amazon. They have themselves as customers plus all the other online retailers. Also, they can better optimize to fit the online business environment with the latest tech. UPS and fedex have to deal with the old ways of doing shipping plus the unions. If they fail, at the very least, they force the other delivery companies to be better competitors.
But ultimately this is a loss for the everyday worker. The loss of the unions means the standard of living will fall for those that work in the delivery business. Walmart has always been seen as the enemy because of their never ending fight to lower prices which means lower salaries for their workers. I think Amazon is done a good job in not only lowering workers pay but destroying jobs. Why has Amazon escaped the same criticism? Not only that, but they are admired by many as the future of doing business and in effect employee treatment. What gives?