This was a demo for CORPORATIONS
Lest you forget, this presentation is for the WORK computer where your employer doesn't want you spending too much time tinkering with your desktop and, stock tickers, fantasy sports leagues, and Facebook/LinkedIn, Pandora, XBox etc.
They want you able to quickly, safely and productively etc. So this arguing over "tiles" and "icons" etc is really a moot point.
The desktop needs to be manageable, reliable and functional.... That is why there should at least be a 'PRO" version and a "HOME" version especially if they want Business to replace their Billion plus desktops world wide with any new Windows product.