If this was the Lawspot blog, that to me would be the most interesting part of the article: why or why not should this marketing approach be legal?
As opposed to 100% clear cut fraud, where even a wary consumer had no reasonable way to know ahead of time that they were not getting the product they thought they were, Nvidia clearly has wiggle room. There's a published spec sheet that is accurate, the formal "4090 Laptop GPU" name is slightly different even if intentionally picked to know that for example retail sales people are pretty likely to leave out the laptop part, there are plenty of press reviews that make the distinction plain, etc. etc.
Yet despite being honest in those respects, it sure feels slimy & deceptive.
I guess for me the next step in investigating this topic would be trying to understand how many if any consumers were actually fully deceived. Are there are any accounts of someone buying a 4090 laptop, finding out soon after that it was not the 4090 performance they expected, and then being denied a return? How often does this happen?