Re: Why the taskbar must be on the side:
I do not agree to this at all.
It is actually the opposite. Things are supposed to be scrolled vertically. Most things don't fit vertically and scrolling so is a fact if life.
Instead it is the horizontal screen real estate that must be optimized to avoid scrolling in two directions.
And scrolling vertically is needed only to view more stuff. Horizontally scrolling must be avoided so that one doesn't have to scroll every line.