Faultline was hit with a pang of curiosity this week about the extent of 4K, HDR, and smart TV features in the most popular TV models available in the US. Of course, such data is not charted publicly, but taking a snapshot of three retailers provides a pretty informative view of the market, as it emerges from lockdown and prepares for holiday promotions. We charted the 15 most popular models across these stores. Walmart and Best Buy allow you to filter search results by best selling, but Amazon lacks that capability, so we used ‘featured,’ as this is the most typical view that consumers will see, when browsing for TVs on the website. Of the 45 units, 10 brands were…