Knew it.. Say what you will about amazon top lists but they keep proving to be great for general judgement on purchases.. The xbox one is running out of options to get even really fast.. They need some of those secret sauces to materialize into more than vague future imaginings fast
Pretty obvious looking at the year. Amazon gets strong stock so anything that is hard to find locally may look stronger there than in stores. That said, ps4/xb1 have had tons of availability in stores for a long time now. The $399 SKU for xb1 is stacked up everywhere I go, so it's not likely to see any artificial inflation on Amazon, same with ps4 and xb1 kinect.
conclusion : Amazon did it again, just like every month in regards to ps4 v xb1 this year.