The author is quite obviously not a video connoisseur. I worked for Circuit City for a number of years and I can tell you with absolute certainty that black levels are the canvas for a brilliant picture. Televisions with the darkest blacks were the most brilliant displays, those with low contrast were crap. Nothing has changed with today's TV's except that it's a bit more difficult to find crap anymore, which is great for the consumer.
To say that high contrast true black is "only necessary when watching in low light" is like saying that a 200HP Busa is only necessary when riding at high speeds. The times when blacks are the most important is when you are watching high quality movies where it is likely you have the lights dimmed anyway. Why would you want to buy something that won't perform at it's peak when you require it the most?
Not fond of the author, seems like a very misinformed individual. Technical jargon is great, but opinions are a dime a dozen.