While that's exciting for loathers of long lines (like me), it also sounds like it could cause a decline in employment, just as automation wiped out millions of manufacturing jobs over the past couple of decades. The reason for the drastic decrease there has been fiercely debated; many argue that trade agreements like NAFTA have resulted in jobs lost to other countries, but data suggests that increased productivity is really to blame.

Increased productivity has traditionally been linked to improvements in technology, which enables more output without adding more workers. Data from the Bureau of Labor Statistics (BLS) shows that the number of jobs in manufacturing saw a sharp decline in 2000 (and then again in 2010 after the credit crunch), not 1994, when NAFTA went into effect. In fact, between the years 1994 and 1998, the number of employees hired in manufacturing actually increased, if only slightly.

According to a 2010 report by the conservative Heritage Foundation, which cites BLS data, declines in manufacturing jobs coincide with significant growth in productivity and output.

So it appears trade agreements are not to blame: Increased productivity is the more likely culprit. And advances in technology are going to continue to impact employment. In fact, a World Economic Forum report from Jan. 2016 predicts that we will lose 5 million jobs by 2020, thanks to technology and automation.

It's unclear what this, and Amazon's new shopping tech, could mean for jobs in the retail sector. While it's easy to assume that this automated-checkout system could replace human cashiers, many believe that existing staff could be repurposed for other positions in stores.

Tom Coughlin, IEEE senior member and president of Coughlin Associates, believes that stores could get their employees to focus more on servicing customers by helping them locate items and even assist them in bringing their heavy shopping out to their cars, instead of spending time trying to collect money from them.

Indeed, a report from the BLS also states that in an effort to combat online shopping, brick-and-mortar stores may emphasize customer service to improve sales. "Traditional retail stores should hire more sales workers to provide this service," says the bureau's retail industry forecast for 2014 to 2024, which projects a 7 percent increase in jobs.

Human workers are also more versatile, and they are able to perform a broad range of job duties that include helping customers find items, operating a cash register and re-stocking shelves. "Because retail sales workers have this versatile range of functions, their usage should also increase," states the report. It's important to note, though, that most stores today already employ stockers and customer service attendants, so it's not clear if companies will increase hires in those areas enough to compensate.

Of course, a lot of this is speculation sparked by Amazon's introduction of its new retail format, which is only in one outlet in Seattle right now. It's unclear whether it will gain popularity and become more widespread.

Even if this cashier-free system takes off, though, there are ways to maintain the number of jobs in retail. The rise of online shopping did not appear to severely impact the number of jobs in the industry between the years 2004 and 2013, although employment did suffer between 2007 and 2010 because of the overall economic downturn.

"A technology driven increase in productivity should not cost any net jobs," says Josh Bivens, director of research and policy at the Economic Policy Institute. "The faster productivity growth we've ever seen came between 1945 and 1970 and 1995 and 2001 -- and job growth in these periods was the fastest, not slowest, on record," he says.

Bivens believes that managing the macroeconomy to ensure enough growth in demand to soak up the extra productive capacity is key to maintaining the number of jobs. Of course, that's easier said than done, and it requires the injection of more money into the economy. That means more than just increasing GDP; it means growing a base of consumers through increasing wages and creating new jobs. And those jobs can't be focused entirely in high-skilled fields.

Regardless of the feasibility though, Bivens reiterates that technological advancements are not to be shunned. "The policy bungling is what's to be feared, not the productivity growth," he says. In other words, while it is possible that developments in tech, such as Amazon Go, and the resulting bump in productivity could kill jobs, it's up to economists and politicians to make sure that they don't.