Love the comments
"Impressive. But I would really love to be able to run Final Cut Pro on the watch and edit my videos on the go more than anything else."
"How on earth would you do that? Your thumb would be bigger than the video thumbnail itself."
Such LOLZ on the interwebs.
Just because it's about Apple doesn't make it designer news.
I guess the question isn't why. The question is: Why not? ;)