This article is from 2010 or before 4K TVs were well in the market.
Keep in mind this writter thinks Vista and Windows 7 operate at the same speed.... That should tell you everything you need to know for their knowledge.
Oh and the Gold tip HDMIs do not cost that much, and yes they do make a difference.
You can find articles from people saying the Earth is flat, the sky is green and the grass is really blue. Although the writters may really belive it.... That does not make it the case.
Putting cheap cables on a nice TV is like putting cheap tires on a fancy car.
Each to their own I guess?
“This article is from 2010 or before 4K TVs were well in the market.”
Here is one from 2016:
https://www.cnet.com/news/ads-voice-assistants-amazon-alexa-google-home-burger-king/