The continuing evolution of the supply chain is putting more and more emphasis on cost.

Only ten plus years ago the internet in general was not viewed as being the serious competitor to retail and "Personal service shopping" that is now so evidently not the case.

Amazon with hindsight was grossly misjudged, as an interesting and struggling departure from the norm.

Now all the major retailers have and are continuing to invest heavily in Internet Sales. 

This will only speed up the inevitable process of - Price first - Choice close behind.

Indeed so far has both the market and Amazon evolved that today's Central Buyers inevitably cross reference both the product category popularity and especially the price by reference to the Amazon site.