There was a skyscraper window executive that was bragging about the strength of some new window. It can stop a person running at full speed. Well it kinda worked, the window didn't break but popped right out and he fell to his death. So unless you're putting that mount on the wall directly into studs (or added studs behind the drywall) you'd have a sad possibly.

Regardless, it's always a pain in the ass plugging into mounted TVs your idea makes sense. I'd even suggest a couple of female to female HDMI adaptors to easily add Roku or Fire stick and such.