I don't agree about the "with every new release" part.Apple QC is proving more and more dog **** with every new hardware release.
Were you around for the first generation MacBook/MacBook Pros back in 2006? There were soooo many QC issues with those products -- experienced so frequently by owners -- (whining, excessive heat, discoloration, bulging batteries, "random shutdown syndrome", failing logic boards) that Arstechnia wrote a good summary "Quality control problems or growing pains at Apple?" article.
In it, the acknowledge that they had written a similar article about Apple's QC back in 2003.
Anyhow, if Apple's QC was truly getting worse after every release, nothing made now -- four years after the first generation MB/MBPs QC fiasco -- would even boot. Nothing.
IMO, Apple's QC is inconsistent. Sometimes a product is spot-on, with no mass issues. And then they do some things that make you shake your head.
But seriously, it's been awhile since their QC dept has bunged something up as good as the first MB/MBPs. If anything, quality's been going up since then, and this MacBook Air video is ... well, boring.